Merge branch 'netconsole-reuse-netpoll_parse_ip_addr-in-configfs-helpers'

Breno Leitao says:

====================
netconsole: reuse netpoll_parse_ip_addr in configfs helpers

This patchset refactors the IP address parsing logic in the netconsole
driver to eliminate code duplication and improve maintainability. The
changes centralize IPv4 and IPv6 address parsing into a single function
(netpoll_parse_ip_addr). For that, it needs to teach
netpoll_parse_ip_addr() to handle strings with newlines, which is the
type of string coming from configfs.

Background

The netconsole driver currently has duplicate IP address parsing logic
in both local_ip_store() and remote_ip_store() functions. This
duplication increases the risk of inconsistencies and makes the code
harder to maintain.

Benefits

* Reduced code duplication: ~40 lines of duplicate parsing logic
  eliminated
 * Improved robustness: Centralized parsing reduces the chance
   of inconsistencies
 * Easier to maintain: Code follow more the netdev way

v3: https://lore.kernel.org/20250723-netconsole_ref-v3-0-8be9b24e4a99@debian.org
v2: https://lore.kernel.org/20250721-netconsole_ref-v2-0-b42f1833565a@debian.org
v1: https://lore.kernel.org/20250718-netconsole_ref-v1-0-86ef253b7a7a@debian.org
====================

Link: https://patch.msgid.link/20250811-netconsole_ref-v4-0-9c510d8713a2@debian.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>