drm/amd/display: enable PCON support for dcn314

[Why]
DCN314 supports PCON.

[How]
Explicitly enable it in dcn314 resources.
Signed-off-by: Roman Li <roman.li@amd.com>
Reviewed-by: Hamza Mahfooz <hamza.mahfooz@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dcn314/dcn314_resource.c

@@ -1750,6 +1750,7 @@ static bool dcn314_resource_construct(
 	dc->caps.post_blend_color_processing = true;
 	dc->caps.force_dp_tps4_for_cp2520 = true;
 	dc->caps.dp_hpo = true;
+	dc->caps.dp_hdmi21_pcon_support = true;
 	dc->caps.edp_dsc_support = true;
 	dc->caps.extended_aux_timeout_support = true;
 	dc->caps.dmcub_support = true;