arm64: dts: renesas: r9a08g045: Correct GICD and GICR sizes

The RZ/G3S SoC is equipped with the GIC-600. The GICD is 64KiB + 64KiB
for the MBI alias (in total 128KiB), and the GICR is 128KiB per CPU.

Despite the RZ/G3S SoC being single-core, it has two instances of GICR.

Fixes: e20396d6 ("arm64: dts: renesas: Add initial DTSI for RZ/G3S SoC")
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/20240730122436.350013-2-prabhakar.mahadev-lad.rj@bp.renesas.com


Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>