Merge branch 'net-followup-series-for-exit_rtnl'

Kuniyuki Iwashima says:

====================
net: Followup series for ->exit_rtnl().

Patch 1 drops the hold_rtnl arg in ops_undo_list() as suggested by Jakub.
Patch 2 & 3 apply ->exit_rtnl() to pfcp and ppp.

v1: https://lore.kernel.org/20250415022258.11491-1-kuniyu@amazon.com
====================

Link: https://patch.msgid.link/20250418003259.48017-1-kuniyu@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>