V4L/DVB (7402): add macro validation for v4l_compat_ioctl32

Added macro CONFIG_COMPAT for v4l_compat_ioctl32.

Signed-off-by: Douglas Schilling Landgraf <dougsland@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/radio/dsbr100.c

@@ -438,7 +438,9 @@ static const struct file_operations usb_dsbr100_fops = {
 	.open		= usb_dsbr100_open,
 	.release	= usb_dsbr100_close,
 	.ioctl		= video_ioctl2,
+#ifdef CONFIG_COMPAT
 	.compat_ioctl	= v4l_compat_ioctl32,
+#endif
 	.llseek		= no_llseek,
 };