at76c50x-usb: fix endpoint debug message

Make sure to use the current alternate setting, which may not be the
same as the first alternate setting, also when printing the number of
endpoints at probe.
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/atmel/at76c50x-usb.c

@@ -2236,7 +2236,7 @@ static int at76_alloc_urbs(struct at76_priv *priv,
 	at76_dbg(DBG_PROC_ENTRY, "%s: ENTER", __func__);
 
 	at76_dbg(DBG_URB, "%s: NumEndpoints %d ", __func__,
-		 interface->altsetting[0].desc.bNumEndpoints);
+		 interface->cur_altsetting->desc.bNumEndpoints);
 
 	ep_in = NULL;
 	ep_out = NULL;