drm/radeon/dpm: implement UVD powergating for KB/KV
Powergate the UVD block when not in use to save power.
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>
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Powergate the UVD block when not in use to save power.
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>