staging: rtl8712: _r8712_free_sta_priv(): Change return type

Change return type of function _r8712_free_sta_priv from u32 to void as
it always returns _SUCCESS and this return value is never used.
Signed-off-by: Nishka Dasgupta <nishkadg.linux@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8712/rtl871x_sta_mgt.c

@@ -77,14 +77,13 @@ static void mfree_all_stainfo(struct sta_priv *pstapriv)
 	spin_unlock_irqrestore(&pstapriv->sta_hash_lock, irqL);
 }
 
-u32 _r8712_free_sta_priv(struct sta_priv *pstapriv)
+void _r8712_free_sta_priv(struct sta_priv *pstapriv)
 {
 	if (pstapriv) {
 		/* be done before free sta_hash_lock */
 		mfree_all_stainfo(pstapriv);
 		kfree(pstapriv->pallocated_stainfo_buf);
 	}
-	return _SUCCESS;
 }
 
 struct sta_info *r8712_alloc_stainfo(struct sta_priv *pstapriv, u8 *hwaddr)

drivers/staging/rtl8712/sta_info.h

@@ -120,7 +120,7 @@ static inline u32 wifi_mac_hash(u8 *mac)
 }
 
 u32 _r8712_init_sta_priv(struct sta_priv *pstapriv);
-u32 _r8712_free_sta_priv(struct sta_priv *pstapriv);
+void _r8712_free_sta_priv(struct sta_priv *pstapriv);
 struct sta_info *r8712_alloc_stainfo(struct sta_priv *pstapriv,
 				     u8 *hwaddr);
 void r8712_free_stainfo(struct _adapter *padapter, struct sta_info *psta);