V4L/DVB (10110): v4l2-ioctl: Fix warnings when using .unlocked_ioctl = __video_ioctl2

This patch fixes this warning:

drivers/media/video/gspca/gspca.c:1811: warning: initialization from incompatible pointer type

The reason is that the returned argument should be a long, not an
integer.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/v4l2-ioctl.c

@@ -1852,7 +1852,7 @@ static int __video_do_ioctl(struct file *file,
 	return ret;
 }
 
-int __video_ioctl2(struct file *file,
+long __video_ioctl2(struct file *file,
 	       unsigned int cmd, unsigned long arg)
 {
 	char	sbuf[128];

include/media/v4l2-ioctl.h

@@ -297,7 +297,7 @@ extern int video_usercopy(struct file *file, unsigned int cmd,
 /* Standard handlers for V4L ioctl's */
 
 /* This prototype is used on fops.unlocked_ioctl */
-extern int __video_ioctl2(struct file *file,
+extern long __video_ioctl2(struct file *file,
 			unsigned int cmd, unsigned long arg);
 
 /* This prototype is used on fops.ioctl