drm/amd/powerplay: guard consistency between CPU copy and local VRAM

This can prevent CPU to use the out-dated copy.

Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Kenneth Feng <kenneth.feng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
5 files changed