drm/amd/display: reverted limiting vscsdp_for_colorimetry and ARGB16161616 pixel format addition

[WHY]
Limiting vscsdp_for_colorimetry for YCbCr420/BT2020 resulted in red/green
point failures in HDR10 DTN tests. The re-implementation of ARGB16161616
was to fix this however it did not actually fix this issue but a side effect of the
issue.

[HOW]
Change ARGB16161616 pixel format to 26.
Reviewed-by: Martin Leung <Martin.Leung@amd.com>
Acked-by: Brian Chang <Brian.Chang@amd.com>
Signed-off-by: Ethan Wellenreiter <Ethan.Wellenreiter@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/dcn10/dcn10_dpp.c

@@ -361,8 +361,6 @@ void dpp1_cnv_setup (
 		select = INPUT_CSC_SELECT_ICSC;
 		break;
 	case SURFACE_PIXEL_FORMAT_GRPH_ARGB16161616:
-		pixel_format = 22;
-		break;
 	case SURFACE_PIXEL_FORMAT_GRPH_ABGR16161616:
 		pixel_format = 26; /* ARGB16161616_UNORM */
 		break;

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubp.c

@@ -278,9 +278,6 @@ void hubp1_program_pixel_format(
 				SURFACE_PIXEL_FORMAT, 10);
 		break;
 	case SURFACE_PIXEL_FORMAT_GRPH_ARGB16161616:
-		REG_UPDATE(DCSURF_SURFACE_CONFIG,
-				SURFACE_PIXEL_FORMAT, 22);
-		break;
 	case SURFACE_PIXEL_FORMAT_GRPH_ABGR16161616: /*we use crossbar already*/
 		REG_UPDATE(DCSURF_SURFACE_CONFIG,
 				SURFACE_PIXEL_FORMAT, 26); /* ARGB16161616_UNORM */

drivers/gpu/drm/amd/display/dc/dcn20/dcn20_dpp.c

@@ -166,8 +166,6 @@ static void dpp2_cnv_setup (
 		select = DCN2_ICSC_SELECT_ICSC_A;
 		break;
 	case SURFACE_PIXEL_FORMAT_GRPH_ARGB16161616:
-		pixel_format = 22;
-		break;
 	case SURFACE_PIXEL_FORMAT_GRPH_ABGR16161616:
 		pixel_format = 26; /* ARGB16161616_UNORM */
 		break;

drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hubp.c

@@ -463,9 +463,6 @@ void hubp2_program_pixel_format(
 				SURFACE_PIXEL_FORMAT, 10);
 		break;
 	case SURFACE_PIXEL_FORMAT_GRPH_ARGB16161616:
-		REG_UPDATE(DCSURF_SURFACE_CONFIG,
-				SURFACE_PIXEL_FORMAT, 22);
-		break;
 	case SURFACE_PIXEL_FORMAT_GRPH_ABGR16161616: /*we use crossbar already*/
 		REG_UPDATE(DCSURF_SURFACE_CONFIG,
 				SURFACE_PIXEL_FORMAT, 26); /* ARGB16161616_UNORM */

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

@@ -244,8 +244,6 @@ void dpp3_cnv_setup (
 		select = INPUT_CSC_SELECT_ICSC;
 		break;
 	case SURFACE_PIXEL_FORMAT_GRPH_ARGB16161616:
-		pixel_format = 22;
-		break;
 	case SURFACE_PIXEL_FORMAT_GRPH_ABGR16161616:
 		pixel_format = 26; /* ARGB16161616_UNORM */
 		break;