Merge branch 'can-xl-prep' into next

Vincent Mailhol  says:

====================

An RFC was sent last weekend to kick-off the discussion of the
introduction of CAN XL: [1] for the kernel side and [2] for the
iproute2 interface. While the series received some positive feedback,
it is far from completion. Some work is still needed to:

  - adjust the nesting of the IFLA_CAN_XL_DATA_BITTIMING_CONST in the
    netlink interface

  - add the CAN XL PWM configuration

and this TODO list may grow if more feedback is received.

Regardless of this, the RFC started with a set of trivial patches to
do some clean-up and some renaming in preparation of the introduction
of CAN XL.

This series just contains those preparation patches which were cherry
picked from the RFC.

The goal is to have those merged first to remove some overhead from
the netlink CAN XL main series before tacking care of the other
comments.

[1] [RFC] can: netlink: add CAN XL
Link: https://lore.kernel.org/linux-can/20241110155902.72807-16-mailhol.vincent@wanadoo.fr/
[2] [RFC] iplink_can: add CAN XL
Link: https://lore.kernel.org/linux-can/20241110160406.73584-10-mailhol.vincent@wanadoo.fr/
====================

Signed-off-by: David Ahern <dsahern@kernel.org>