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/mISDNif.h b/include/linux/mISDNif.h
index 78c3bed..b5e7f22 100644
--- a/include/linux/mISDNif.h
+++ b/include/linux/mISDNif.h
@@ -251,7 +251,7 @@
 struct mISDNhead {
 	unsigned int	prim;
 	unsigned int	id;
-}  __attribute__((packed));
+}  __packed;
 
 #define MISDN_HEADER_LEN	sizeof(struct mISDNhead)
 #define MAX_DATA_SIZE		2048