drivers/net: use __packed annotation

cleanup patch.

Use new __packed annotation in drivers/net/

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/usb/kaweth.c b/drivers/net/usb/kaweth.c
index d6078b8..2b7b39c 100644
--- a/drivers/net/usb/kaweth.c
+++ b/drivers/net/usb/kaweth.c
@@ -207,7 +207,7 @@
 	__le16 segment_size;
 	__u16 max_multicast_filters;
 	__u8 reserved3;
-} __attribute__ ((packed));
+} __packed;
 
 /****************************************************************
  *     kaweth_device