qcacmn: Update htc_endpoint only for htt tx endpoint

Update htc_endpoint only for htt tx endpoint to avoid
double freeing of Tx Queue packets as it will be
freed in htt_htc_misc_pkt_pool_free.
Rename htc_endpoint to htc_htt_tx_endpoint to reflect
it's appropriate use.

Change-Id: I736ba08505acc829eb15be30538553dd945695f6
CRs-Fixed: 1006498

htc/htc_services.c

@@ -332,10 +332,6 @@ A_STATUS htc_connect_service(HTC_HANDLE HTCHandle,
 
 	} while (false);
 
-	if (HTT_SERVICE_GROUP == (pConnectReq->service_id >> 8))
-		hif_save_htc_htt_config_endpoint(target->hif_dev,
-						 assignedEndpoint);
-
 	AR_DEBUG_PRINTF(ATH_DEBUG_TRC, ("-htc_connect_service\n"));
 
 	return status;