Revert "drm/amd/powerplay: drop unnecessary message support check"

The below 3 messages are not supported on Renoir
SMU_MSG_PrepareMp1ForShutdown
SMU_MSG_PrepareMp1ForUnload
SMU_MSG_PrepareMp1ForReset

It needs to revert patch:
drm/amd/powerplay: drop unnecessary message support check
to avoid set mp1 state fail during gpu reset on renoir.

Signed-off-by: changfeng <Changfeng.Zhu@amd.com>
Reviewed-by: Kenneth Feng <kenneth.feng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>