In order to support Ethernet on the MT7988 SoC add support for NETSYS v3
as well as new paths and USXGMII SerDes to the mtk_eth_soc driver.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
(cherry picked from commit 6983a215d9d1966f95bc5b1c0045c200948b2079)