video: dw_hdmi: Add read_hpd hook

Add support for DW HDMI Read HPD status.

Signed-off-by: Jagan Teki <jagan@edgeble.ai>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
diff --git a/drivers/video/dw_hdmi.c b/drivers/video/dw_hdmi.c
index 3a3b9b7..989b7ab 100644
--- a/drivers/video/dw_hdmi.c
+++ b/drivers/video/dw_hdmi.c
@@ -946,6 +946,9 @@
 		return -ENODEV;
 	}
 
+	if (hdmi->ops && hdmi->ops->read_hpd)
+		hdmi->ops->read_hpd(hdmi, true);
+
 	return 0;
 }