Merge branch 'riscv-sophgo-add-ethernet-support-for-sg2044'

Inochi Amaoto says:

====================
riscv: sophgo: Add ethernet support for SG2044

The ethernet controller of SG2044 is Synopsys DesignWare IP with
custom clock. Add glue layer for it.

v6: https://lore.kernel.org/20250305063920.803601-1-inochiama@gmail.com
v5: https://lore.kernel.org/20250216123953.1252523-1-inochiama@gmail.com
v4: https://lore.kernel.org/20250209013054.816580-1-inochiama@gmail.com
v3: https://lore.kernel.org/20241223005843.483805-1-inochiama@gmail.com
RFC: https://lore.kernel.org/20241101014327.513732-1-inochiama@gmail.com
v2: https://lore.kernel.org/20241025011000.244350-1-inochiama@gmail.com
v1: https://lore.kernel.org/20241021103617.653386-1-inochiama@gmail.com
====================

Link: https://patch.msgid.link/20250307011623.440792-1-inochiama@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>