V4L/DVB: cleanup redundant tests on unsigned

Remove redundant tests on unsigned.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/usbvision/usbvision-video.c b/drivers/media/video/usbvision/usbvision-video.c
index d7056a5..d03e592 100644
--- a/drivers/media/video/usbvision/usbvision-video.c
+++ b/drivers/media/video/usbvision/usbvision-video.c
@@ -541,7 +541,7 @@
 	struct usb_usbvision *usbvision = video_drvdata(file);
 	int chan;
 
-	if ((vi->index >= usbvision->video_inputs) || (vi->index < 0) )
+	if (vi->index >= usbvision->video_inputs)
 		return -EINVAL;
 	if (usbvision->have_tuner) {
 		chan = vi->index;