uboot-phytec

board: mscc: serval: Update MSCC Serval boards

In Serval SoC family there are 2 different pcb, both of them have the same
phy, but with different version. Therefore implement board_phy_config
and set all the phys in the same way.

Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>