drm/amd/display: DP link validation bug for YUV422

remove limit YUV422 color depth to 24bits which is
workaround for old ASIC
Signed-off-by: Hersen Wu <hersenxs.wu@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c

@@ -1379,12 +1379,7 @@ static uint32_t bandwidth_in_kbps_from_timing(
 	uint32_t bits_per_channel = 0;
 	uint32_t kbps;
 
-	if (timing->pixel_encoding == PIXEL_ENCODING_YCBCR422)
-		bits_per_channel = 12;
-	else{
-
 	switch (timing->display_color_depth) {
-
 	case COLOR_DEPTH_666:
 		bits_per_channel = 6;
 		break;
@@ -1406,7 +1401,7 @@ static uint32_t bandwidth_in_kbps_from_timing(
 	default:
 		break;
 	}
-	}
+
 	ASSERT(bits_per_channel != 0);
 
 	kbps = timing->pix_clk_khz;