Merge branch 'net-ethernet-mtk_eth_soc-improve-support-for-mt7988'

Daniel Golle says:

====================
net: ethernet: mtk_eth_soc: improve support for MT7988

This series fixes and completes commit 445eb6448ed3b ("net: ethernet:
mtk_eth_soc: add basic support for MT7988 SoC") and also adds support
for using the in-SoC SRAM to previous MT7986 and MT7981 SoCs.
====================

Link: https://lore.kernel.org/r/cover.1692721443.git.daniel@makrotopia.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>