V4L/DVB (10907): avoid loading the entire videodev.h header on V4L2 drivers

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/w9968cf.c b/drivers/media/video/w9968cf.c
index fd5c4c8..2a25580 100644
--- a/drivers/media/video/w9968cf.c
+++ b/drivers/media/video/w9968cf.c
@@ -42,6 +42,7 @@
 #include <asm/page.h>
 #include <asm/uaccess.h>
 #include <linux/page-flags.h>
+#include <linux/videodev.h>
 #include <media/v4l2-ioctl.h>
 
 #include "w9968cf.h"