V4L/DVB (7298): pvrusb2: Account for dtv choice (a bit) in v4l2 implementation

The v4l2 implementation in pvru2b2 must produce a sane answer when
asked, when the input choice is set to dtv.
Signed-off-by: Mike Isely <isely@pobox.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/pvrusb2/pvrusb2-v4l2.c

@@ -267,6 +267,7 @@ static int pvr2_v4l2_do_ioctl(struct inode *inode, struct file *file,
 		ret = 0;
 		switch (vi->index) {
 		case PVR2_CVAL_INPUT_TV:
+		case PVR2_CVAL_INPUT_DTV:
 		case PVR2_CVAL_INPUT_RADIO:
 			tmp.type = V4L2_INPUT_TYPE_TUNER;
 			break;