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/sfc/selftest.c b/drivers/net/sfc/selftest.c
index c088740..1f83404 100644
--- a/drivers/net/sfc/selftest.c
+++ b/drivers/net/sfc/selftest.c
@@ -38,7 +38,7 @@
 	struct udphdr udp;
 	__be16 iteration;
 	const char msg[64];
-} __attribute__ ((packed));
+} __packed;
 
 /* Loopback test source MAC address */
 static const unsigned char payload_source[ETH_ALEN] = {