staging: rtl8192u: Change type of rtl8192_rx_initiate()

Change type of function rtl8192_rx_initiate from int to void as it
always returns 0 and this value is never used.
Signed-off-by: Nishka Dasgupta <nishkadg.linux@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8192u/r8192U_core.c

@@ -713,7 +713,7 @@ static u32 get_rxpacket_shiftbytes_819xusb(struct ieee80211_rx_stats *pstats)
 		+ pstats->RxBufShift);
 }
 
-static int rtl8192_rx_initiate(struct net_device *dev)
+static void rtl8192_rx_initiate(struct net_device *dev)
 {
 	struct r8192_priv *priv = (struct r8192_priv *)ieee80211_priv(dev);
 	struct urb *entry;
@@ -763,8 +763,6 @@ static int rtl8192_rx_initiate(struct net_device *dev)
 		skb_queue_tail(&priv->rx_queue, skb);
 		usb_submit_urb(entry, GFP_KERNEL);
 	}
-
-	return 0;
 }
 
 void rtl8192_set_rxconf(struct net_device *dev)