staging: r8188eu: remove extern from function prototypes

Declaring function prototypes extern is redundant and triggers
checkpatch warnings. Remove all extern from function prototypes.

Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com> # Edimax N150
Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20221101191458.8619-2-straube.linux@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/r8188eu/include/osdep_service.h

@@ -66,7 +66,7 @@ static inline int rtw_netif_queue_stopped(struct net_device *pnetdev)
 		netif_tx_queue_stopped(netdev_get_tx_queue(pnetdev, 3));
 }
 
-extern int RTW_STATUS_CODE(int error_code);
+int RTW_STATUS_CODE(int error_code);
 
 void *rtw_malloc2d(int h, int w, int size);
 

drivers/staging/r8188eu/include/rtw_mlme_ext.h

@@ -388,7 +388,7 @@ struct mlme_ext_priv {
 void init_mlme_ext_priv(struct adapter *adapter);
 int init_hw_mlme_ext(struct adapter *padapter);
 void free_mlme_ext_priv (struct mlme_ext_priv *pmlmeext);
-extern struct xmit_frame *alloc_mgtxmitframe(struct xmit_priv *pxmitpriv);
+struct xmit_frame *alloc_mgtxmitframe(struct xmit_priv *pxmitpriv);
 
 unsigned char networktype_to_raid(unsigned char network_type);
 u8 judge_network_type(struct adapter *padapter, unsigned char *rate, int len);
@@ -483,7 +483,7 @@ void report_add_sta_event(struct adapter *padapter, unsigned char *addr,
 			  int cam_idx);
 
 void beacon_timing_control(struct adapter *padapter);
-extern u8 set_tx_beacon_cmd(struct adapter *padapter);
+u8 set_tx_beacon_cmd(struct adapter *padapter);
 unsigned int setup_beacon_frame(struct adapter *padapter,
 				unsigned char *beacon_frame);
 void update_mgnt_tx_rate(struct adapter *padapter, u8 rate);

drivers/staging/r8188eu/include/sta_info.h

@@ -295,19 +295,19 @@ static inline u32 wifi_mac_hash(u8 *mac)
 	return x;
 }
 
-extern int _rtw_init_sta_priv(struct sta_priv *pstapriv);
-extern void _rtw_free_sta_priv(struct sta_priv *pstapriv);
+int _rtw_init_sta_priv(struct sta_priv *pstapriv);
+void _rtw_free_sta_priv(struct sta_priv *pstapriv);
 
 #define stainfo_offset_valid(offset) (offset < NUM_STA && offset >= 0)
 int rtw_stainfo_offset(struct sta_priv *stapriv, struct sta_info *sta);
 struct sta_info *rtw_get_stainfo_by_offset(struct sta_priv *stapriv, int off);
 
-extern struct sta_info *rtw_alloc_stainfo(struct sta_priv *stapriv, u8 *hwaddr);
-extern u32	rtw_free_stainfo(struct adapter *adapt, struct sta_info *psta);
-extern void rtw_free_all_stainfo(struct adapter *adapt);
-extern struct sta_info *rtw_get_stainfo(struct sta_priv *stapriv, u8 *hwaddr);
-extern u32 rtw_init_bcmc_stainfo(struct adapter *adapt);
-extern struct sta_info *rtw_get_bcmc_stainfo(struct adapter *padapter);
-extern u8 rtw_access_ctrl(struct adapter *padapter, u8 *mac_addr);
+struct sta_info *rtw_alloc_stainfo(struct sta_priv *stapriv, u8 *hwaddr);
+u32	rtw_free_stainfo(struct adapter *adapt, struct sta_info *psta);
+void rtw_free_all_stainfo(struct adapter *adapt);
+struct sta_info *rtw_get_stainfo(struct sta_priv *stapriv, u8 *hwaddr);
+u32 rtw_init_bcmc_stainfo(struct adapter *adapt);
+struct sta_info *rtw_get_bcmc_stainfo(struct adapter *padapter);
+u8 rtw_access_ctrl(struct adapter *padapter, u8 *mac_addr);
 
 #endif /* _STA_INFO_H_ */