ip_tunnels: remove custom alignment and packing

The custom alignment of struct ip_tunnel_key is unnecessary. In struct
sw_flow_key, it starts at offset 256, in struct ip_tunnel_info it's the
first field.

The structure is also packed even without the __packed keyword.
Signed-off-by: Jiri Benc <jbenc@redhat.com>
Acked-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/ip_tunnels.h

@@ -36,7 +36,7 @@ struct ip_tunnel_key {
 	__u8			ipv4_ttl;
 	__be16			tp_src;
 	__be16			tp_dst;
-} __packed __aligned(4); /* Minimize padding. */
+};
 
 /* Indicates whether the tunnel info structure represents receive
  * or transmit tunnel parameters.