Merge branch 'net-macb-various-cleanups'

Théo Lebrun says:

====================
net: macb: various cleanups

Fix many oddities inside the MACB driver. They accumulated in my
work-in-progress branch while working on MACB/GEM EyeQ5 support.

Part of this series has been seen on the lkml in March then June.
See below for a semblance of a changelog.

The initial goal was to post them alongside EyeQ5 support, but that
makes for too big of a series. It'll come afterwards, with new
features (interrupt coalescing, ethtool .set_channels() and XDP mostly).

[0]: https://lore.kernel.org/lkml/20250627-macb-v2-0-ff8207d0bb77@bootlin.com/
====================

Link: https://patch.msgid.link/20251014-macb-cleanup-v1-0-31cd266e22cd@bootlin.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>