drm: xlnx: hdmi: Set wait event flag for TMDS mode

wait_event_timeout process and starts the streaming before timer timeout.
In TMDS mode, when the link is ready set this flag.

Signed-off-by: Rajesh Gugulothu <rajesh.gugulothu@amd.com>
Reviewed-by: Vishal Sagar <vishal.sagar@amd.com>

Author: gugulot

drivers/gpu/drm/xlnx/xlnx_hdmi.c

@@ -2670,6 +2670,7 @@ static void xlnx_hdmi_piointr_handler(struct xlnx_hdmi *hdmi)
 				}
 			} else {
 				xlnx_hdmi_streamup_callback(hdmi);
+				hdmi->wait_for_streamup = 1;
 			}
 			xlnx_hdmi_aux_enable(hdmi);
 			xlnx_hdmi_auxintr_enable(hdmi);