usb: wusbcore: add debug prints to reservation and channel change

This patch adds debug prints to the reservation and channel change
sequence to help with debugging channel change problems.

Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/usb/wusbcore/reservation.c b/drivers/usb/wusbcore/reservation.c
index ead79f7..d5efd0f 100644
--- a/drivers/usb/wusbcore/reservation.c
+++ b/drivers/usb/wusbcore/reservation.c
@@ -51,6 +51,7 @@
 	struct uwb_mas_bm mas;
 	char buf[72];
 
+	dev_dbg(dev, "%s: state = %d\n", __func__, rsv->state);
 	switch (rsv->state) {
 	case UWB_RSV_STATE_O_ESTABLISHED:
 		uwb_rsv_get_usable_mas(rsv, &mas);