Merge branch 'net-warn-about-attempts-to-register-negative-ifindex'

Jakub Kicinski says:

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net: warn about attempts to register negative ifindex

Follow up to the recently posted fix for OvS lacking input
validation:
https://lore.kernel.org/all/20230814203840.2908710-1-kuba@kernel.org/

Warn about negative ifindex more explicitly and misc YNL updates.
====================

Link: https://lore.kernel.org/r/20230814205627.2914583-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>