drm/amd/display: enable fgcg by default

[why]
sw has most of the fgcg enabled which is the same as HW default.
but driver disabled some due to enable flag not initialized.

comparing HW state, we still need to enable dpp and dio.
Reviewed-by: Muhammad Ahmed <ahmed.ahmed@amd.com>
Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Charlene Liu <charlene.liu@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/resource/dcn35/dcn35_resource.c

@@ -1907,7 +1907,8 @@ static bool dcn35_resource_construct(
 
 	if (dc->ctx->dce_environment == DCE_ENV_PRODUCTION_DRV)
 		dc->debug = debug_defaults_drv;
-
+	/*HW default is to have all the FGCG enabled, SW no need to program them*/
+	dc->debug.enable_fine_grain_clock_gating.u32All = 0xFFFF;
 	// Init the vm_helper
 	if (dc->vm_helper)
 		vm_helper_init(dc->vm_helper, 16);