Merge branch 'uapi-ethtool-avoid-flex-array-in-struct-ethtool_link_settings'

Kees Cook says:

====================
UAPI: ethtool: Avoid flex-array in struct ethtool_link_settings

This reverts the tagged struct group in struct ethtool_link_settings and
instead just removes the flexible array member from Linux's view as it
is entirely unused.
====================

Link: https://patch.msgid.link/20241115204115.work.686-kees@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>