Merge branch 'rtnetlink-use-rtnl_register_many'

Kuniyuki Iwashima says:

====================
rtnetlink: Use rtnl_register_many().

This series converts all rtnl_register() and rtnl_register_module()
to rtnl_register_many() and finally removes them.

Once this series is applied, I'll start converting doit() to per-netns
RTNL.

v1: https://lore.kernel.org/20241011220550.46040-1-kuniyu@amazon.com/
====================

Link: https://patch.msgid.link/20241014201828.91221-1-kuniyu@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>