TS-TPC-7990 Ethernet PHY replacement

The TS-TPC-7990 Rev.E and later have replaced the Marvell Gbit Ethernet PHY with the Broadcom BCM54213PE. If using the stock embeddedTS u-boot this change is completely transparent and should not affect any user software.

Under Linux this uses the generic Ethernet PHY driver and behaves the same as the previous Marvell PHY.

U-boot has been updated to detect the new PCB, PHY, and to write PHY regs to make the Ethernet LEDs behave the same way as the previous Marvell chipset. For users customizing u-boot new boards will require this commit. This is backwards compatible with previous PCBs and only adds support for the new PCB revs.

• a7d9986dc91a2186fb4bc8e2ce13b76d7060335c - ts7990: Add support for Rev.E

Our standard u-boot that includes this support is Aug-02-2023. See the changelog for more details.