V4L/DVB (11992): Add missing __devexit_p()

Add missing __devexit_p() to several drivers. Also add a few missing
__init, __devinit and __exit markers. These errors could result in
build failures depending on the kernel configuration.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
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 d03e592..90b5891 100644
--- a/drivers/media/video/usbvision/usbvision-video.c
+++ b/drivers/media/video/usbvision/usbvision-video.c
@@ -1794,7 +1794,7 @@
 	.name		= "usbvision",
 	.id_table	= usbvision_table,
 	.probe		= usbvision_probe,
-	.disconnect	= usbvision_disconnect
+	.disconnect	= __devexit_p(usbvision_disconnect),
 };
 
 /*