drm/amd/display: Remove unnecessary wait mpcc idle.

Before power gate plane, mpcc idle wait is processed,
no need to wait another time.

Signed-off-by: Yongqiang Sun <yongqiang.sun@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Yongqiang Sun 2017-11-15 16:06:15 -05:00 • committed by Alex Deucher
commit 096480eac6