Fixes tags need work in the drm-msm-lumag tree

In commit

  0aeed866cb938 ("drm/amd/display: Fix dangling pointer in CRTC reset function")

Fixes tag

  Fixes: e7b07ceef2a6 ("drm/amd/display: Merge amdgpu_dm_crtc and dm_crtc_state")

has these problem(s):

  - Subject does not match target commit subject
    Just use
	git log -1 --format='Fixes: %h ("%s")'