sh: Add support Renesas Solutions Migo-R board

Migo-R is a board based on SH7722 and has may devices.
In this patch, supported SCIF, NOR flash and Ethernet.

Signed-off-by: Yusuke Goda <goda.yusuke@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
9 files changed