Comment 17 for bug 2002467

This commit is required for bug 2000110, and I can't figure out any good solution for this.
"drm/amdgpu: make sure to init common IP before gmc" introduces regression which could be found here https://gitlab.freedesktop.org/drm/amd/-/issues/2216 and has been reverted from 5.10 stable kernel.

Anyway, I'll submit SRU to revert this commit, and try to provide better solution for bug 2000110