ath6kl: Don't print error message when recv is canceled

An error message ath6kl_htc_rxmsg_pending_handler isn't appropate for when
the error is ECANCELED. This could be the result of a perfectly appropriate
RX cancel due to shutdown or suspend. This allows the right cleanup to
continue, but without an alarming error message in this particular case.
Signed-off-by: Steve deRosier <steve.derosier@lairdtech.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

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

@@ -2222,6 +2222,7 @@ int ath6kl_htc_rxmsg_pending_handler(struct htc_target *target,
 	}
 
 	if (status) {
+		if (status != -ECANCELED)
 			ath6kl_err("failed to get pending recv messages: %d\n",
 				   status);