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/wireless/at76c50x-usb.c b/drivers/net/wireless/at76c50x-usb.c
index 8a2d4af..429b281 100644
--- a/drivers/net/wireless/at76c50x-usb.c
+++ b/drivers/net/wireless/at76c50x-usb.c
@@ -305,7 +305,7 @@
 	unsigned char poll_timeout[3];
 	unsigned char state;
 	unsigned char string;
-} __attribute__((packed));
+} __packed;
 
 static inline int at76_is_intersil(enum board_type board)
 {