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/linux/if_frad.h b/include/linux/if_frad.h
index 80b3a10..191ee08 100644
--- a/include/linux/if_frad.h
+++ b/include/linux/if_frad.h
@@ -135,7 +135,7 @@
    __be16 PID;
 
 #define IP_NLPID pad 
-} __attribute__((packed));
+} __packed;
 
 /* see RFC 1490 for the definition of the following */
 #define FRAD_I_UI		0x03