staging: vt6656: iwctl.c: Remove return statement of iwctl_giwessid

This function will always return 0, and this data is not used by who
calls this function.
Signed-off-by: Marcos Paulo de Souza <marcos.mage@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vt6656/iwctl.c

@@ -856,8 +856,7 @@ int iwctl_siwessid(struct net_device *dev,
 /*
  * Wireless Handler : get essid
  */
-
-int iwctl_giwessid(struct net_device *dev,
+void iwctl_giwessid(struct net_device *dev,
              struct iw_request_info *info,
              struct iw_point *wrq,
              char *extra)
@@ -879,8 +878,6 @@ int iwctl_giwessid(struct net_device *dev,
 
         wrq->length = pItemSSID->len;
 	wrq->flags = 1; // active
-
-	return 0;
 }
 
 /*

drivers/staging/vt6656/iwctl.h

@@ -97,7 +97,7 @@ int iwctl_siwessid(struct net_device *dev,
              struct iw_point *wrq,
              char *extra);
 
-int iwctl_giwessid(struct net_device *dev,
+void iwctl_giwessid(struct net_device *dev,
              struct iw_request_info *info,
              struct iw_point *wrq,
              char *extra);

drivers/staging/vt6656/main_usb.c

@@ -1657,7 +1657,7 @@ static int  device_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) {
 		{
 			char essid[IW_ESSID_MAX_SIZE+1];
 			if (wrq->u.essid.pointer) {
-				rc = iwctl_giwessid(dev, NULL,
+				iwctl_giwessid(dev, NULL,
 					    &(wrq->u.essid), essid);
 				if (copy_to_user(wrq->u.essid.pointer,
 						         essid,