arm64: dts: renesas: r9a09g011: Add L2 Cache node

The Cortex-A53 processor on RZ/V2M has 512 KB L2 Cache.
Add L2 Cache node to SoC dtsi.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Link: https://lore.kernel.org/r/20221110160931.101539-1-biju.das.jz@bp.renesas.com


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