staging: r8188eu: mark _rtw_free_sta_priv as void

_rtw_free_sta_priv() always returns _SUCCESS and it's return value
isn't checked either.
So it makes sense to mark it as void instead of u32.
Signed-off-by: Vihas Makwana <makvihas@gmail.com>
Link: https://lore.kernel.org/r/20220213173424.39935-1-makvihas@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/r8188eu/core/rtw_sta_mgt.c

@@ -117,7 +117,7 @@ inline struct sta_info *rtw_get_stainfo_by_offset(struct sta_priv *stapriv, int
 	return (struct sta_info *)(stapriv->pstainfo_buf + offset * sizeof(struct sta_info));
 }
 
-u32	_rtw_free_sta_priv(struct	sta_priv *pstapriv)
+void _rtw_free_sta_priv(struct	sta_priv *pstapriv)
 {
 	struct list_head *phead, *plist;
 	struct sta_info *psta = NULL;
@@ -147,8 +147,6 @@ u32	_rtw_free_sta_priv(struct	sta_priv *pstapriv)
 
 		vfree(pstapriv->pallocated_stainfo_buf);
 	}
-
-	return _SUCCESS;
 }
 
 struct	sta_info *rtw_alloc_stainfo(struct sta_priv *pstapriv, u8 *hwaddr)

drivers/staging/r8188eu/include/sta_info.h

@@ -344,7 +344,7 @@ static inline u32 wifi_mac_hash(u8 *mac)
 }
 
 extern u32	_rtw_init_sta_priv(struct sta_priv *pstapriv);
-extern u32	_rtw_free_sta_priv(struct sta_priv *pstapriv);
+extern 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);