rpmsg: core: fix race in driver_override_show() and use core helper

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/rpmsg/rpmsg_core.c"
                    ],
                    "versions": [
                        {
                            "version": "39e47767ec9b22f844c2a07c9d329256960d4021",
                            "lessThan": "392c6b68334aa0e0ae9aba95c0a366bcb0d92f5d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "39e47767ec9b22f844c2a07c9d329256960d4021",
                            "lessThan": "d66b8074c555e8abb0ae19eea1c9f3635498bdde",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "39e47767ec9b22f844c2a07c9d329256960d4021",
                            "lessThan": "47615557447185917afa432b7958f87583c417cb",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "39e47767ec9b22f844c2a07c9d329256960d4021",
                            "lessThan": "90c8353f471821d7ccd4fe573a2402e056192494",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "39e47767ec9b22f844c2a07c9d329256960d4021",
                            "lessThan": "7654e6e3cd6bdee9602f6063b3c670bd556d7e61",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "39e47767ec9b22f844c2a07c9d329256960d4021",
                            "lessThan": "2e4a70f3c30910427e5ea848b799066d67b963d5",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "39e47767ec9b22f844c2a07c9d329256960d4021",
                            "lessThan": "954557957177c3c13d7c655976665b1170da5e50",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "39e47767ec9b22f844c2a07c9d329256960d4021",
                            "lessThan": "42023d4b6d2661a40ee2dcf7e1a3528a35c638ca",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                }

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/rpmsg/rpmsg_core.c"
                    ],
                    "versions": [
                        {
                            "version": "4.18",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "4.18",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.252",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.202",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.165",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.128",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.75",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.16",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19.6",
                            "lessThanOrEqual": "6.19.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }