arm64: dts: renesas: rzg2l-smarc-som: Add vdd core regulator

Add vdd core regulator (1.1 V).

This patch add regulator support for gpu.

The H/W manual mentions nothing about a gpu regulator. So using vdd
core regulator for gpu.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/20211208104026.421-4-biju.das.jz@bp.renesas.com


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