qcacmn: Remove QDF_BUG from htc_wait_recv_ctrl_message

Currently if Firmware is down during probe, driver will BUG_ON and
re-probe will not happen. Remove QDF_BUG to allow driver to fail
gracefully, allowing re-probing by the platform driver.

Change-Id: I65fca58168f1c8413eef4790c0f428e64a58f3a7
CRs-Fixed: 2027472

htc/htc_recv.c

@@ -647,7 +647,8 @@ QDF_STATUS htc_wait_recv_ctrl_message(HTC_TARGET *target)
 	/* Wait for BMI request/response transaction to complete */
 	if (qdf_wait_single_event(&target->ctrl_response_valid,
 				  HTC_CONTROL_RX_TIMEOUT)) {
-		QDF_BUG(0);
+		AR_DEBUG_PRINTF(ATH_DEBUG_ERR,
+			("Failed to receive control message\n"));
 		return QDF_STATUS_E_FAILURE;
 	}