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/ipv6.h b/include/linux/ipv6.h
index ab9e9e8..e62683b 100644
--- a/include/linux/ipv6.h
+++ b/include/linux/ipv6.h
@@ -58,7 +58,7 @@
 	/* 
 	 * TLV encoded option data follows.
 	 */
-} __packed;	/* required for some archs */
+} __attribute__((packed));	/* required for some archs */
 
 #define ipv6_destopt_hdr ipv6_opt_hdr
 #define ipv6_hopopt_hdr  ipv6_opt_hdr
@@ -99,7 +99,7 @@
 	__u8			type;
 	__u8			length;
 	struct in6_addr		addr;
-} __packed;
+} __attribute__((packed));
 
 /*
  *	IPv6 fixed header