sh: Add support SH2/SH2A which is CPU of Renesas Technology

Add support SH2/SH2A basic function.

Signed-off-by: Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
11 files changed