wlan: Synchronize country code HDD ioctl

HDD device ioctl for the country code should only return once it
updates the wiphy data structure.

Change-Id: I594b81786d5443444cdfafdb12de79e2080d869a
CRs-Fixed: 530587
diff --git a/CORE/HDD/inc/wlan_hdd_wext.h b/CORE/HDD/inc/wlan_hdd_wext.h
index 6d2e266..fc661a0 100644
--- a/CORE/HDD/inc/wlan_hdd_wext.h
+++ b/CORE/HDD/inc/wlan_hdd_wext.h
@@ -427,6 +427,7 @@
 #ifdef WLAN_FEATURE_PACKET_FILTERING
 void wlan_hdd_set_mc_addr_list(hdd_adapter_t *pAdapter, v_U8_t set);
 #endif
+void* wlan_hdd_change_country_code_callback(void *pAdapter);
 
 #endif // __WEXT_IW_H__