uboot-phytec

net: ti: icssg-prueth: Add ICSSG ethernet driver

This is the Ethernet driver for TI SoCs with the
ICSSG PRU Sub-system running EMAC firmware.
This driver caters to either of the slices(pru/rtu pair)
of the icssg subsystem.

Following are the firmwares needed to run cores:

am65x-pru0-prueth-fw.elf for pru0 of slice0
am65x-rtu0-prueth-fw.elf for rtu0 of slice0
am65x-pru1-prueth-fw.elf for pru1 of slice1
am65x-rtu1-prueth-fw.elf for rtu1 of slice1

One and exactly one of the slices is supported
as the u-boot ethernet supports probing one interface
at a time.

Signed-off-by: Keerthy <j-keerthy@ti.com>