V4L/DVB (9809): uvcvideo: Add nodrop module parameter to turn incomplete frame drop off.

The driver drops incomplete uncompressed video frames to avoid confusing
userspace with corrupt data. Add a nodrop module parameter to turn that
behaviour off and make all frames available to userspace.

Signed-off-by: Laurent Pinchart <laurent.pinchart@skynet.be>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/uvc/uvcvideo.h b/drivers/media/video/uvc/uvcvideo.h
index 595b90e..437df60 100644
--- a/drivers/media/video/uvc/uvcvideo.h
+++ b/drivers/media/video/uvc/uvcvideo.h
@@ -683,6 +683,7 @@
 #define UVC_WARN_MINMAX		0
 #define UVC_WARN_PROBE_DEF	1
 
+extern unsigned int uvc_no_drop_param;
 extern unsigned int uvc_trace_param;
 
 #define uvc_trace(flag, msg...) \