Revert "drm/amd/display: Only program P-State force if pipe config changed"

This reverts commit 3351c608 ("drm/amd/display: Only program P-State force if pipe config changed")
Which causes regression.

Reviewed-by: Samson Tam <samson.tam@amd.com>
Acked-by: Tom Chung <chiahsuan.chung@amd.com>
Signed-off-by: Alvin Lee <alvin.lee2@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>