drm/amd/display: Add NV12/P010 formats to primary plane

drm/amd/display: Add NV12/P010 formats to primary plane

Add NV12, NV21, and P010 YUV formats to the primary plane's supported
format list, enabling YUV content to be scanned out directly from the
primary plane.

Assisted-by: Claude: claude-sonnet-4.5
Reviewed-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>