Merge branch 'add-functional-support-for-gigabit-ethernet-driver'

Biju Das says:

====================
Add functional support for Gigabit Ethernet driver

The DMAC and EMAC blocks of Gigabit Ethernet IP found on RZ/G2L SoC are
similar to the R-Car Ethernet AVB IP.

The Gigabit Ethernet IP consists of Ethernet controller (E-MAC), Internal
TCP/IP Offload Engine (TOE)  and Dedicated Direct memory access controller
(DMAC).

With a few changes in the driver we can support both IPs.

This patch series is aims to add functional support for Gigabit Ethernet
driver by filling all the stubs except set_features.

set_feature patch will send as separate RFC patch along with rx_checksum
patch, as it needs further discussion related to HW checksum.

With this series, we can do boot kernel with rootFS mounted on NFS on
RZ/G2L platforms.
====================

Link: https://lore.kernel.org/r/20211012163613.30030-1-biju.das.jz@bp.renesas.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>