Merge branch 'riscv-spacemit-add-ethernet-support-for-k3'

Inochi Amaoto says:

====================
riscv: spacemit: Add ethernet support for K3

Add initial support for ethernet controller of the Spacemit K3 SoC.
This ethernet controller is almost a standard Synopsys DesignWare
MAC (version 5.40a). This controller require a syscon device to
configure some basic features, like interface type and internal delay.
====================

Link: https://patch.msgid.link/20260316010041.164360-1-inochiama@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>