arm64: renesas: Enable RENESAS_IRQC

Select RENESAS_IRQC for Arm64 SoCs from Renesas to enable
build of drivers/irqchip/irq-renesas-irqc.c.

Signed-off-by: Magnus Damm <damm+renesas@opensource.se>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>