accel/rocket: clear rdev on device init failure

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/accel/rocket/rocket_drv.c"
                    ],
                    "versions": [
                        {
                            "version": "ed98261b41687323ffa02ca20fef1e60b38fd1aa",
                            "lessThan": "79071b67182e1b352d51a3917729b8d424710b49",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ed98261b41687323ffa02ca20fef1e60b38fd1aa",
                            "lessThan": "dd47a6c920083b069f00f0920e4566915a6aec46",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ed98261b41687323ffa02ca20fef1e60b38fd1aa",
                            "lessThan": "4ac852419f0d317c7bd8db5b8acb3cc78be7fe33",
                            "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/accel/rocket/rocket_drv.c"
                    ],
                    "versions": [
                        {
                            "version": "6.18",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.18",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.59",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.13",
                            "lessThanOrEqual": "7.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.3",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }