Merge branch 'rtnetlink-rtnl-avoidance-in-rtnl_getlink-and-rtnl_dump_ifinfo'

Eric Dumazet says:

====================
rtnetlink: RTNL avoidance in rtnl_getlink() and rtnl_dump_ifinfo()

Many shell scripts invoke iproute2 commands specifying a device by
its name.

This series improves their performance avoiding RTNL acquisition
for their (repeated) name->index conversion.
====================

Link: https://patch.msgid.link/20260525083542.1565964-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>