drm/amd/display: Fix refresh rate issue on Club 3D

Recently we introduced a patch for fixing an MST issue, but it caused a
regression on Club 3D since we could not set a refresh rate higher than
60Hz. This commit fixes this issue by adding a proper check after
validating the stream.

Fixes: f04d275d ("drm/amd/display: add mst port output bw check")
Reviewed-by: Hersen Wu <hersenxs.wu@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

@@ -7214,12 +7214,10 @@ create_validate_stream_for_sink(struct amdgpu_dm_connector *aconnector,
 			break;
 		}
 
-		if (stream->signal == SIGNAL_TYPE_DISPLAY_PORT_MST)
+		dc_result = dc_validate_stream(adev->dm.dc, stream);
+		if (dc_result == DC_OK && stream->signal == SIGNAL_TYPE_DISPLAY_PORT_MST)
 			dc_result = dm_dp_mst_is_port_support_mode(aconnector, stream);
 
-		if (dc_result == DC_OK)
-			dc_result = dc_validate_stream(adev->dm.dc, stream);
-
 		if (dc_result != DC_OK) {
 			DRM_DEBUG_KMS("Mode %dx%d (clk %d) failed DC validation with error %d (%s)\n",
 				      drm_mode->hdisplay,