qcacmn: Add WMI service define for offchan_data_tid

Add offchan_data_tx_support service enum to map to new service bit for
this support.

Change-Id: I772d1d43e507469efc678f791ce92ef26eb844a5
CRs-Fixed: 2145450

wmi_unified_param.h

@@ -5920,6 +5920,7 @@ typedef enum {
 	wmi_service_ack_timeout,
 	wmi_service_widebw_scan,
 	wmi_service_bcn_offload_start_stop_support,
+	wmi_service_offchan_data_tid_support,
 
 	wmi_services_max,
 } wmi_conv_service_ids;