drm/amd/display: Set alpha enable to 0 for some specific formats

Set alpha_en to 0 in some specific color formats.
Signed-off-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Acked-by: Roman Li <roman.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dpp/dcn30/dcn30_dpp.c

@@ -293,9 +293,11 @@ void dpp3_cnv_setup (
 		break;
 	case SURFACE_PIXEL_FORMAT_GRPH_RGB111110_FIX:
 		pixel_format = 112;
+		alpha_en = 0;
 		break;
 	case SURFACE_PIXEL_FORMAT_GRPH_BGR101111_FIX:
 		pixel_format = 113;
+		alpha_en = 0;
 		break;
 	case SURFACE_PIXEL_FORMAT_VIDEO_ACrYCb2101010:
 		pixel_format = 114;
@@ -319,9 +321,11 @@ void dpp3_cnv_setup (
 		break;
 	case SURFACE_PIXEL_FORMAT_GRPH_RGB111110_FLOAT:
 		pixel_format = 118;
+		alpha_en = 0;
 		break;
 	case SURFACE_PIXEL_FORMAT_GRPH_BGR101111_FLOAT:
 		pixel_format = 119;
+		alpha_en = 0;
 		break;
 	default:
 		break;