video: adf: add informational flags to interfaces

Informational flags don't affect ADF directly but may be useful to
clients.  Currently used to indicate primary and external displays.

Change-Id: I343c7f0148da0869244c8e818350e9855525df85
Signed-off-by: Greg Hackmann <ghackmann@google.com>
diff --git a/drivers/video/adf/adf_fops.c b/drivers/video/adf/adf_fops.c
index 343bdcc..abec58e 100644
--- a/drivers/video/adf/adf_fops.c
+++ b/drivers/video/adf/adf_fops.c
@@ -570,6 +570,7 @@
 
 	data.type = intf->type;
 	data.id = intf->idx;
+	data.flags = intf->flags;
 
 	err = adf_interface_get_screen_size(intf, &data.width_mm,
 			&data.height_mm);