ath6kl: set rx urb count threshold to 1

Reduce the Rx count threshold to make sure we read
the available credits for Tx.

Signed-off-by: Julien Massot <jmassot@aldebaran-robotics.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

drivers/net/wireless/ath/ath6kl/usb.c

@@ -481,8 +481,8 @@ static void ath6kl_usb_start_recv_pipes(struct ath6kl_usb *ar_usb)
 	 *		ATH6KL_USB_RX_BUFFER_SIZE);
 	 */
 
-	ar_usb->pipes[ATH6KL_USB_PIPE_RX_DATA].urb_cnt_thresh =
-	    ar_usb->pipes[ATH6KL_USB_PIPE_RX_DATA].urb_alloc / 2;
+	ar_usb->pipes[ATH6KL_USB_PIPE_RX_DATA].urb_cnt_thresh = 1;
+
 	ath6kl_usb_post_recv_transfers(&ar_usb->pipes[ATH6KL_USB_PIPE_RX_DATA],
 				       ATH6KL_USB_RX_BUFFER_SIZE);
 }