Add #if for 3.14 kernel change (#87)

Fixes compiling after changes in torvalds/linux@f663dd9 and torvalds/linux@99932d4

Fixes #86

drivers/net/wireless/realtek/rtl8192cu/os_dep/linux/os_intfs.c

@@ -945,8 +945,13 @@ unsigned int rtw_classify8021d(struct sk_buff *skb)
  return dscp >> 5;
 }
 
+#if (LINUX_VERSION_CODE>=KERNEL_VERSION(3,14,0))
 static u16 rtw_select_queue(struct net_device *dev, struct sk_buff *skb,
- void *accel_priv, select_queue_fallback_t fallback)
+ void *accel_priv,
+ select_queue_fallback_t fallback)
+#else
+static u16 rtw_select_queue(struct net_device *dev, struct sk_buff *skb)
+#endif
 {
  _adapter *padapter = rtw_netdev_priv(dev);
  struct mlme_priv *pmlmepriv = &padapter->mlmepriv;