Merge branch 'net-constify-struct-regmap_bus-regmap_config'

Javier Carrasco says:

====================
net: constify struct regmap_bus/regmap_config

This series adds the const modifier to the remaining regmap_bus and
regmap_config structs within the net subsystem that are effectively
used as const (i.e., only read after their declaration), but kept as
writtable data.
====================

Link: https://patch.msgid.link/20240703-net-const-regmap-v1-0-ff4aeceda02c@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>