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/ov511.c b/drivers/media/video/ov511.c
index 9edaca4..3d3c48d 100644
--- a/drivers/media/video/ov511.c
+++ b/drivers/media/video/ov511.c
@@ -626,9 +626,9 @@
 			break;
 
 		/* Retry until idle */
-		do
+		do {
 			rc = reg_r(ov, R511_I2C_CTL);
-		while (rc > 0 && ((rc&1) == 0));
+		} while (rc > 0 && ((rc&1) == 0));
 		if (rc < 0)
 			break;
 
@@ -703,9 +703,9 @@
 			return rc;
 
 		/* Retry until idle */
-		do
-			 rc = reg_r(ov, R511_I2C_CTL);
-		while (rc > 0 && ((rc&1) == 0));
+		do {
+			rc = reg_r(ov, R511_I2C_CTL);
+		} while (rc > 0 && ((rc & 1) == 0));
 		if (rc < 0)
 			return rc;
 
@@ -729,9 +729,9 @@
 			return rc;
 
 		/* Retry until idle */
-		do
+		do {
 			rc = reg_r(ov, R511_I2C_CTL);
-		while (rc > 0 && ((rc&1) == 0));
+		} while (rc > 0 && ((rc&1) == 0));
 		if (rc < 0)
 			return rc;