geneve: Avoid -Wflex-array-member-not-at-end warning

-Wflex-array-member-not-at-end was introduced in GCC-14, and we are
getting ready to enable it, globally.

Move the conflicting declaration to the end of the corresponding
structure. Notice that `struct ip_tunnel_info` is a flexible
structure, this is a structure that contains a flexible-array
member.

Fix the following warning:

drivers/net/geneve.c:56:33: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]

Signed-off-by: Gustavo A. R. Silva <[email protected]>
Reviewed-by: Andrew Lunn <[email protected]>
Link: https://patch.msgid.link/aMBK78xT2fUnpwE5@kspp
Signed-off-by: Jakub Kicinski <[email protected]>

Author: GustavoARSilva

drivers/net/geneve.c

@@ -53,14 +53,16 @@ struct geneve_dev_node {
 };
 
 struct geneve_config {
-	struct ip_tunnel_info	info;
 	bool			collect_md;
 	bool			use_udp6_rx_checksums;
 	bool			ttl_inherit;
 	enum ifla_geneve_df	df;
 	bool			inner_proto_inherit;
 	u16			port_min;
 	u16			port_max;
+
+	/* Must be last --ends in a flexible-array member. */
+	struct ip_tunnel_info	info;
 };
 
 /* Pseudo network device */