staging: rtl8192e: Remove set but not used variables 'broad_addr, stype'

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/staging/rtl8192e/rtl8192e/rtl_core.c: In function '_rtl92e_tx':
drivers/staging/rtl8192e/rtl8192e/rtl_core.c:1732:28: warning:
 variable 'broad_addr' set but not used [-Wunused-but-set-variable]

drivers/staging/rtl8192e/rtl8192e/rtl_core.c:1731:24: warning:
 variable 'stype' set but not used [-Wunused-but-set-variable]

This remove unnessesary bool variable 'multi_addr, broad_addr, uni_addr'
Also 'stype' never used and  can be removed.
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8192e/rtl8192e/rtl_core.c

@@ -1728,8 +1728,7 @@ static short _rtl92e_tx(struct net_device *dev, struct sk_buff *skb)
 				    MAX_DEV_ADDR_SIZE);
 	struct tx_desc *pdesc = NULL;
 	struct rtllib_hdr_1addr *header = NULL;
-	u16 fc = 0, type = 0, stype = 0;
-	bool  multi_addr = false, broad_addr = false, uni_addr = false;
+	u16 fc = 0, type = 0;
 	u8 *pda_addr = NULL;
 	int   idx;
 	u32 fwinfo_size = 0;
@@ -1747,22 +1746,14 @@ static short _rtl92e_tx(struct net_device *dev, struct sk_buff *skb)
 	header = (struct rtllib_hdr_1addr *)(((u8 *)skb->data) + fwinfo_size);
 	fc = le16_to_cpu(header->frame_ctl);
 	type = WLAN_FC_GET_TYPE(fc);
-	stype = WLAN_FC_GET_STYPE(fc);
 	pda_addr = header->addr1;
 
 	if (is_broadcast_ether_addr(pda_addr))
-		broad_addr = true;
+		priv->stats.txbytesbroadcast += skb->len - fwinfo_size;
 	else if (is_multicast_ether_addr(pda_addr))
-		multi_addr = true;
-	else
-		uni_addr = true;
-
-	if (uni_addr)
-		priv->stats.txbytesunicast += skb->len - fwinfo_size;
-	else if (multi_addr)
 		priv->stats.txbytesmulticast += skb->len - fwinfo_size;
 	else
-		priv->stats.txbytesbroadcast += skb->len - fwinfo_size;
+		priv->stats.txbytesunicast += skb->len - fwinfo_size;
 
 	spin_lock_irqsave(&priv->irq_th_lock, flags);
 	ring = &priv->tx_ring[tcb_desc->queue_index];