net: use __packed annotation

cleanup patch.

Use new __packed annotation in net/ and include/
(except netfilter)

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h
index 4b86011..f9e7473 100644
--- a/include/net/sctp/structs.h
+++ b/include/net/sctp/structs.h
@@ -443,7 +443,7 @@
 	__u8 signature[SCTP_SECRET_SIZE];
 	__u32 __pad;		/* force sctp_cookie alignment to 64 bits */
 	struct sctp_cookie c;
-} __attribute__((packed));
+} __packed;
 
 /* This is another convenience type to allocate memory for address
  * params for the maximum size and pass such structures around
@@ -488,7 +488,7 @@
 	union sctp_addr daddr;
 	unsigned long sent_at;
 	__u64 hb_nonce;
-} __attribute__((packed)) sctp_sender_hb_info_t;
+} __packed sctp_sender_hb_info_t;
 
 /*
  *  RFC 2960 1.3.2 Sequenced Delivery within Streams