[media] siano: split debugfs code into a separate file

To avoid mixing two different things at the same place, move the
debugfs code into a separate file.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/usb/siano/smsusb.c b/drivers/media/usb/siano/smsusb.c
index acd3d1e..def5e41 100644
--- a/drivers/media/usb/siano/smsusb.c
+++ b/drivers/media/usb/siano/smsusb.c
@@ -412,6 +412,8 @@
 
 	smscore_set_board_id(dev->coredev, board_id);
 
+	dev->coredev->is_usb_device = true;
+
 	/* initialize urbs */
 	for (i = 0; i < MAX_URBS; i++) {
 		dev->surbs[i].dev = dev;