drm/amd/display: fix 4K stereo screen flash issue

[Why]
HDMI_scramber is not enabled for pixel rate >340Mhz.
[How]
Calculate the phy clock to include the Hw frame packing factor.
Signed-off-by: Charlene Liu <charlene.liu@amd.com>
Reviewed-by: Chris Park <Chris.Park@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -1975,6 +1975,9 @@ static void calculate_phy_pix_clks(struct dc_stream_state *stream)
 	else
 		stream->phy_pix_clk =
 			stream->timing.pix_clk_khz;
+
+	if (stream->timing.timing_3d_format == TIMING_3D_FORMAT_HW_FRAME_PACKING)
+		stream->phy_pix_clk *= 2;
 }
 
 enum dc_status resource_map_pool_resources(