drm/amd/powerplay: move asic unrelated function to hwmgr.c.

It's generic and used by multiple asics.

Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
4 files changed