net: Add support for CHANGEUPPER notifier error injection

Since CHANGEUPPER can now fail, add support for it in the newly
introduced netdev notifier error injection infrastructure.

Signed-off-by: Ido Schimmel <[e-mail]>
Signed-off-by: Jiri Pirko <[e-mail]>
Acked-by: Nikolay Aleksandrov <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

Documentation/fault-injection/notifier-error-inject.txt

···
  * NETDEV_POST_INIT
  * NETDEV_PRECHANGEMTU
  * NETDEV_PRECHANGEUPPER
+ * NETDEV_CHANGEUPPER
 
 Example: Inject netdevice mtu change error (-22 == -EINVAL)
 

lib/netdev-notifier-error-inject.c

···
 		{ NOTIFIER_ERR_INJECT_ACTION(NETDEV_POST_INIT) },
 		{ NOTIFIER_ERR_INJECT_ACTION(NETDEV_PRECHANGEMTU) },
 		{ NOTIFIER_ERR_INJECT_ACTION(NETDEV_PRECHANGEUPPER) },
+		{ NOTIFIER_ERR_INJECT_ACTION(NETDEV_CHANGEUPPER) },
 		{}
 	}
 };