drm/client: Fully protect modes[] with dev->mode_config.mutex

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/gpu/drm/drm_client_modeset.c"
                    ],
                    "versions": [
                        {
                            "version": "e13a058310509b22b2b45cbdd82d8797e173c3db",
                            "lessThan": "5a2f957e3c4553bbb100504a1acfeaeb33f4ca4e",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e13a058310509b22b2b45cbdd82d8797e173c3db",
                            "lessThan": "41586487769eede64ab1aa6c65c74cbf76c12ef0",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e13a058310509b22b2b45cbdd82d8797e173c3db",
                            "lessThan": "d2dc6600d4e3e1453e3b1fb233e9f97e2a1ae949",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e13a058310509b22b2b45cbdd82d8797e173c3db",
                            "lessThan": "18c8cc6680ce938d0458859b6a08b4d34f7d8055",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e13a058310509b22b2b45cbdd82d8797e173c3db",
                            "lessThan": "04e018bd913d3d3336ab7d21c2ad31a9175fe984",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e13a058310509b22b2b45cbdd82d8797e173c3db",
                            "lessThan": "8ceb873d816786a7c8058f50d903574aff8d3764",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e13a058310509b22b2b45cbdd82d8797e173c3db",
                            "lessThan": "3eadd887dbac1df8f25f701e5d404d1b90fd0fea",
                            "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/gpu/drm/drm_client_modeset.c"
                    ],
                    "versions": [
                        {
                            "version": "4.14",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "4.14",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.4.275",
                            "lessThanOrEqual": "5.4.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.216",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.156",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.87",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.28",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.8.7",
                            "lessThanOrEqual": "6.8.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.9",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }