drm/msm: don't tear down KMS twice when KMS init fails

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c",
                        "drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c"
                    ],
                    "versions": [
                        {
                            "version": "506efcba31296e9cbc4f8f148eec1e4b29039931",
                            "lessThan": "54437ace956dc7b758c0219d6f76654b3ead8d69",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "506efcba31296e9cbc4f8f148eec1e4b29039931",
                            "lessThan": "08827aa40f0ee9d37dcff8d6acb340b970051486",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "506efcba31296e9cbc4f8f148eec1e4b29039931",
                            "lessThan": "e2a99fa93b400dfbb9598103249f71969501094a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "506efcba31296e9cbc4f8f148eec1e4b29039931",
                            "lessThan": "93c125e4ea98fb25f927ba5a334d85845127d667",
                            "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/msm/disp/mdp4/mdp4_kms.c",
                        "drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c"
                    ],
                    "versions": [
                        {
                            "version": "6.7",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.7",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.114",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.52",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.6",
                            "lessThanOrEqual": "7.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.3",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }