qcacld-3.0: Remove redundant extern keyword from wext public APIs

Some of wext public APIs are declared using extern storage
class specifier which is not needed hence clean up extern
keyword from wext public API declarations from wlan_hdd_wext.h

Change-Id: Ib1fe79a94b62bc457784340a7e930489fffe98f9
CRs-Fixed: 2202699

core/hdd/inc/wlan_hdd_wext.h

@@ -255,30 +255,30 @@ struct ccp_freq_chan_map {
 #define HDD_FWTEST_MU_DEFAULT_VALUE 40
 #define HDD_FWTEST_MAX_VALUE 500
 
-extern int hdd_unregister_wext(struct net_device *dev);
-extern int hdd_register_wext(struct net_device *dev);
-extern int hdd_wlan_get_freq(uint32_t chan, uint32_t *freq);
-extern void hdd_display_stats_help(void);
-extern void hdd_wlan_get_version(struct hdd_context *hdd_ctx,
-				 union iwreq_data *wrqu, char *extra);
-
-extern void hdd_wlan_get_stats(struct hdd_adapter *adapter, uint16_t *length,
-			       char *buffer, uint16_t buf_len);
-extern void hdd_wlan_list_fw_profile(uint16_t *length,
-			       char *buffer, uint16_t buf_len);
-
-extern int iw_set_var_ints_getnone(struct net_device *dev,
-				   struct iw_request_info *info,
-				   union iwreq_data *wrqu, char *extra);
-
-extern int iw_set_three_ints_getnone(struct net_device *dev,
-				     struct iw_request_info *info,
-				     union iwreq_data *wrqu, char *extra);
-
-extern int hdd_priv_get_data(struct iw_point *p_priv_data,
-			     union iwreq_data *wrqu);
-
-extern void *mem_alloc_copy_from_user_helper(const void *wrqu_data, size_t len);
+int hdd_unregister_wext(struct net_device *dev);
+int hdd_register_wext(struct net_device *dev);
+int hdd_wlan_get_freq(uint32_t chan, uint32_t *freq);
+void hdd_display_stats_help(void);
+void hdd_wlan_get_version(struct hdd_context *hdd_ctx,
+			 union iwreq_data *wrqu, char *extra);
+
+void hdd_wlan_get_stats(struct hdd_adapter *adapter, uint16_t *length,
+		       char *buffer, uint16_t buf_len);
+void hdd_wlan_list_fw_profile(uint16_t *length,
+			      char *buffer, uint16_t buf_len);
+
+int iw_set_var_ints_getnone(struct net_device *dev,
+			   struct iw_request_info *info,
+			   union iwreq_data *wrqu, char *extra);
+
+int iw_set_three_ints_getnone(struct net_device *dev,
+			     struct iw_request_info *info,
+			     union iwreq_data *wrqu, char *extra);
+
+int hdd_priv_get_data(struct iw_point *p_priv_data,
+		     union iwreq_data *wrqu);
+
+void *mem_alloc_copy_from_user_helper(const void *wrqu_data, size_t len);
 
 /**
  * wlan_hdd_get_linkspeed_for_peermac() - Get link speed for a peer