drm/amd/display: refactor programming of DRR

[Why]
Keep enable_stream_timing programming only
timing related stuff.

[How]
Move DRR and static screen mask programming from
enable_stream_timing to outside in
apply_single_controller_ctx_to_hw

Signed-off-by: Anthony Koo <[email protected]>
Reviewed-by: Aric Cyr <[email protected]>
Acked-by: Bhawanpreet Lakha <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
2 files changed