header: fix broken headers for user space

__packed is only defined in kernel space, so we should use
__attribute__((packed)) for the code shared between kernel and user space.

Two __attribute() annotations are replaced with __attribute__() too.

Signed-off-by: Changli Gao <xiaosuo@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/if_ether.h b/include/linux/if_ether.h
index c831467..bed7a46 100644
--- a/include/linux/if_ether.h
+++ b/include/linux/if_ether.h
@@ -119,7 +119,7 @@
 	unsigned char	h_dest[ETH_ALEN];	/* destination eth addr	*/
 	unsigned char	h_source[ETH_ALEN];	/* source ether addr	*/
 	__be16		h_proto;		/* packet type ID field	*/
-} __packed;
+} __attribute__((packed));
 
 #ifdef __KERNEL__
 #include <linux/skbuff.h>