V4L/DVB (8757): v4l-dvb: fix a bunch of sparse warnings

Fixed a lot of sparse warnings: mostly warnings about shadowed variables
and signed/unsigned mismatches.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/btcx-risc.c b/drivers/media/video/btcx-risc.c
index f42701f..3324ab3 100644
--- a/drivers/media/video/btcx-risc.c
+++ b/drivers/media/video/btcx-risc.c
@@ -184,12 +184,12 @@
 }
 
 void
-btcx_calc_skips(int line, int width, unsigned int *maxy,
+btcx_calc_skips(int line, int width, int *maxy,
 		struct btcx_skiplist *skips, unsigned int *nskips,
 		const struct v4l2_clip *clips, unsigned int nclips)
 {
 	unsigned int clip,skip;
-	int end,maxline;
+	int end, maxline;
 
 	skip=0;
 	maxline = 9999;