qcacmn: Add qdf time api to get time of the day in millisec

qcacld-2.0 to qcacmn propagation

Adds qdf time api to get time of the day in millisec

Also send host timestamp to firmware, so that firmware can print the
logs timestamp in sync with host via the wmi interface,with
api wmi_send_time_stamp_sync_cmd_tlv()

Change-Id: Id6acfc5227fdca2fbf8d266998fdfc4046adc5f4
CRs-Fixed: 2193978

wmi/inc/wmi_unified_priv.h

@@ -1544,6 +1544,7 @@ QDF_STATUS (*send_invoke_neighbor_report_cmd)(wmi_unified_t wmi_handle,
 		struct wmi_invoke_neighbor_report_params *params);
 
 void (*wmi_pdev_id_conversion_enable)(wmi_unified_t wmi_handle);
+void (*send_time_stamp_sync_cmd)(wmi_unified_t wmi_handle);
 void (*wmi_free_allocated_event)(A_UINT32 cmd_event_id,
 				void **wmi_cmd_struct_ptr);
 int (*wmi_check_and_pad_event)(void *os_handle, void *param_struc_ptr,