netconsole: move struct inet_addr into netconsole.c

The struct inet_addr lives in netpoll.h, but since commit a111639647
("netconsole: move local_ip/remote_ip/ipv6 to netconsole_target") the
only user is netconsole. Move the definition into netconsole.c

Suggested-by: Breno Leitao <leitao@debian.org>
Reviewed-by: Breno Leitao <leitao@debian.org>
Signed-off-by: Gustavo Luiz Duarte <gustavold@gmail.com>
Link: https://patch.msgid.link/20260903-netcons_ipv6-v4-6-bdd183c844d3@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/netconsole.c

@@ -151,6 +151,15 @@ enum target_state {
 	STATE_DEACTIVATED,
 };
 
+struct inet_addr {
+	/* Address family: AF_UNSPEC when unset, else AF_INET or AF_INET6 */
+	u8			family;
+	union {
+		__be32		ip;
+		struct in6_addr	in6;
+	};
+};
+
 /**
  * struct netcons_userdata - Formatted userdata payload of a target.
  * @rcu:	Used to free the payload after a grace period.

include/linux/netpoll.h

@@ -16,15 +16,6 @@
 #include <linux/ip.h>
 #include <linux/udp.h>
 
-struct inet_addr {
-	/* Address family: AF_UNSPEC when unset, else AF_INET or AF_INET6 */
-	u8			family;
-	union {
-		__be32		ip;
-		struct in6_addr	in6;
-	};
-};
-
 struct netpoll {
 	struct net_device *dev;
 	netdevice_tracker dev_tracker;