Staging: wlan-ng: Fix wrong #ifdef #endif sequence

This patch fixes bug #13820 from bugzilla.kernel.org.

Quote: "If ETHTOOL_GLINK is not defined, the end for switch case is not
to be found."

Signed-off-by: Maximiliano David Bustos <md.bustos90@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/wlan-ng/p80211netdev.c

@@ -522,8 +522,8 @@ static int p80211netdev_ethtool(wlandevice_t *wlandev, void __user *useraddr)
 		if (copy_to_user(useraddr, &edata, sizeof(edata)))
 			return -EFAULT;
 		return 0;
-	}
 #endif
+	}
 
 	return -EOPNOTSUPP;
 }