drm/amdgpu: adjust register address calculation

the UMC_STATUS register is not linear, adjust offset
calculation formula to get correct address

Signed-off-by: Stanley.Yang <Stanley.Yang@amd.com>
Reviewed-by: Tao Zhou <tao.zhou1@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Stanley.Yang 2022-02-11 17:35:18 +08:00 • committed by Alex Deucher
commit 1915a43395