Add DT bindings for the Renesas RZ/A1 Interrupt Controller.
Signed-off-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: NSimon Horman <horms+renesas@verge.net.au>
Reviewed-by: NRob Herring <robh@kernel.org>
Signed-off-by: NMarc Zyngier <marc.zyngier@arm.com>