drm/amd/display: Add fallback configuration for set DRR in DCN10

Set OTG/OPTC parameters to 0 if something goes wrong on DCN10.

Acked-by: Hamza Mahfooz <hamza.mahfooz@amd.com>
Signed-off-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>