Document RZ/G2M (R8A774A1) SoC bindings.
Reviewed-by: NBiju Das <biju.das@bp.renesas.com>
Reviewed-by: NRob Herring <robh@kernel.org>
Reviewed-by: NSimon Horman <horms+renesas@verge.net.au>
Signed-off-by: NFabrizio Castro <fabrizio.castro@bp.renesas.com>
Signed-off-by: NMarc Zyngier <marc.zyngier@arm.com>