uboot-phytec

net: sh-eth: Add support R8A7791

R8A7791 has the same sh-ether IP core as other SH/rmobile.
This patch adds support of R8A7791.

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
CC: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
CC: Joe Hershberger <joe.hershberger@gmail.com>