staging: r8188eu: Remove wrapper _exit_critical_mutex()

This wrapper is a simple call to mutex_exit().
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8188eu/core/rtw_mlme_ext.c

@@ -4438,7 +4438,7 @@ s32 dump_mgntframe_and_wait_ack(struct adapter *padapter, struct xmit_frame *pmg
 	}
 
 	pxmitpriv->ack_tx = false;
-	_exit_critical_mutex(&pxmitpriv->ack_tx_mutex, NULL);
+	mutex_unlock(&pxmitpriv->ack_tx_mutex);
 
 	 return ret;
 }

drivers/staging/rtl8188eu/hal/usb_ops_linux.c

@@ -111,7 +111,7 @@ static int usbctrl_vendorreq(struct intf_hdl *pintfhdl, u8 request, u16 value, u
 			break;
 	}
 release_mutex:
-	_exit_critical_mutex(&dvobjpriv->usb_vendor_req_mutex, NULL);
+	mutex_unlock(&dvobjpriv->usb_vendor_req_mutex);
 exit:
 	return status;
 }

drivers/staging/rtl8188eu/include/osdep_service.h

@@ -76,13 +76,6 @@ static inline int _enter_critical_mutex(struct mutex *pmutex,
 	return ret;
 }
 
-
-static inline void _exit_critical_mutex(struct mutex *pmutex,
-					unsigned long *pirqL)
-{
-		mutex_unlock(pmutex);
-}
-
 static inline void rtw_list_delete(struct list_head *plist)
 {
 	list_del_init(plist);

drivers/staging/rtl8188eu/os_dep/os_intfs.c

@@ -1111,7 +1111,7 @@ int netdev_open(struct net_device *pnetdev)
 
 	_enter_critical_mutex(padapter->hw_init_mutex, NULL);
 	ret = _netdev_open(pnetdev);
-	_exit_critical_mutex(padapter->hw_init_mutex, NULL);
+	mutex_unlock(padapter->hw_init_mutex);
 	return ret;
 }