drm/msm/adreno: Assign msm_gpu->pdev earlier to avoid nullptrs

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                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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                        "drivers/gpu/drm/msm/adreno/adreno_gpu.c",
                        "drivers/gpu/drm/msm/msm_gpu.c"
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{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/gpu/drm/msm/adreno/adreno_gpu.c",
                        "drivers/gpu/drm/msm/msm_gpu.c"
                    ],
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                            "version": "3.12",
                            "status": "affected"
                        },
                        {
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                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.273",
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                        },
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                            "version": "5.15.224",
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                            "versionType": "original_commit_for_fix"
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                }