V4L/DVB (13506): uvcvideo: Factorize common field in uvc_entity structure

The bNrInPins and baSourceID fields are common among all entities (some
of use bSourceID but this is conceptually the same). Move those two
fields out of entity type-specific unions into the uvc_entity structure
top level.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/uvc/uvc_v4l2.c b/drivers/media/video/uvc/uvc_v4l2.c
index 9e1f2c2..23239a4 100644
--- a/drivers/media/video/uvc/uvc_v4l2.c
+++ b/drivers/media/video/uvc/uvc_v4l2.c
@@ -625,8 +625,8 @@
 					break;
 			}
 			pin = iterm->id;
-		} else if (pin < selector->selector.bNrInPins) {
-			pin = selector->selector.baSourceID[index];
+		} else if (pin < selector->bNrInPins) {
+			pin = selector->baSourceID[index];
 			list_for_each_entry(iterm, &chain->entities, chain) {
 				if (!UVC_ENTITY_IS_ITERM(iterm))
 					continue;
@@ -680,7 +680,7 @@
 			break;
 		}
 
-		if (input == 0 || input > chain->selector->selector.bNrInPins)
+		if (input == 0 || input > chain->selector->bNrInPins)
 			return -EINVAL;
 
 		return uvc_query_ctrl(chain->dev, UVC_SET_CUR,