Merge branch 'net-dsa-b53-mmap-add-bcm63xx-ephy-power-control'

Kyle Hendry says:

====================
net: dsa: b53: mmap: Add bcm63xx EPHY power control

The gpio controller on some bcm63xx SoCs has a register for
controlling functionality of the internal fast ethernet phys.
These patches allow the b53 driver to enable/disable phy
power.

The register also contains reset bits which will be set by
a reset driver in another patch series:
https://lore.kernel.org/all/20250715234605.36216-1-kylehendrydev@gmail.com/

v1: https://lore.kernel.org/20250716002922.230807-1-kylehendrydev@gmail.com
====================

Link: https://patch.msgid.link/20250724035300.20497-1-kylehendrydev@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>