Staging: wlan-ng: Fix return in void function warning

This fixes checkpatch.pl warning:
WARNING: void function return statements are not generally useful
Signed-off-by: NAybuke Ozdemir <aybuke.147@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/wlan-ng/hfa384x_usb.c

@@ -3530,8 +3530,6 @@ static void hfa384x_usbin_rx(wlandevice_t *wlandev, struct sk_buff *skb)
 				    usbin->rxfrm.desc.status));
 		break;
 	}
-
-	return;
 }
 
 /*----------------------------------------------------------------
@@ -3641,8 +3639,6 @@ static void hfa384x_int_rxmonitor(wlandevice_t *wlandev,
 
 	/* pass it back up */
 	prism2sta_ev_rx(wlandev, skb);
-
-	return;
 }
 
 /*----------------------------------------------------------------