Add platform code and DTs for Renesas RZ/A1 R7S72100 SoC.
Distinguishing feature of this SoC is that it has up to
10 MiB of on-SoC static RAM (SRAM).
The DTs are imported from Linux 5.0.11, commit d5a2675b207d .
Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Chris Brandt <chris.brandt@renesas.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
