From: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Date: Wed, 14 Apr 2021 17:29:36 +0200

While converting Mikrotik RB532 support to use device tree I stumbled
over the korina ethernet driver, which used way too many MIPS specific
hacks. This series cleans this all up and adds support for device tree.

Changes in v2:
  - added device tree support to get rid of idt_cpu_freq
  - fixed compile test on 64bit archs
  - fixed descriptor current address handling by storing/using mapped
    dma addresses (dma controller modifies current address)

The last patch causes compile failures.  Incorrect number of
arguments to of_get_mac_address(), please fix this and resubmit,
thanks.