staging:r8188eu: Remove rx_handler_data unnecessary read

Rx handler (assigned with netdev_rx_handler_register,
called from __netif_receive_skb()) uses value of dev->rx_handler_data.
The driver has no rx handler and does not need it, so remove rx_handler_data read.
Signed-off-by: NIvan Safonov <insafonov@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8188eu/TODO

@@ -9,11 +9,6 @@ TODO:
 - merge Realtek's bugfixes and new features into the driver
 - switch to use LIB80211
 - switch to use MAC80211
-- figure out what to do with this code in rtw_recv_indicatepkt():
-	rcu_read_lock();
-	rcu_dereference(padapter->pnetdev->rx_handler_data);
-	rcu_read_unlock();
-  Perhaps delete it, perhaps assign to some local variable.
 
 Please send any patches to Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
 and Larry Finger <Larry.Finger@lwfinger.net>.

drivers/staging/rtl8188eu/os_dep/recv_linux.c

@@ -121,10 +121,6 @@ int rtw_recv_indicatepkt(struct adapter *padapter,
 		}
 	}
 
-	rcu_read_lock();
-	rcu_dereference(padapter->pnetdev->rx_handler_data);
-	rcu_read_unlock();
-
 	skb->ip_summed = CHECKSUM_NONE;
 	skb->dev = padapter->pnetdev;
 	skb->protocol = eth_type_trans(skb, padapter->pnetdev);