team: add __exit modifier to team_nl_fini()

team_nl_fini is only called when the module exits, so add the __exit
modifier to it.

Signed-off-by: Zhengchao Shao <[e-mail]>
Reviewed-by: Simon Horman <[e-mail]>
Reviewed-by: Hangbin Liu <[e-mail]>
Reviewed-by: Jiri Pirko <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>

drivers/net/team/team.c

···
 	return genl_register_family(&team_nl_family);
 }
 
-static void team_nl_fini(void)
+static void __exit team_nl_fini(void)
 {
 	genl_unregister_family(&team_nl_family);
 }