dt-bindings: soc: renesas: Add RZ/G3E variant SYS binding

dt-bindings: soc: renesas: Add RZ/G3E variant SYS binding

Add the RZ/G3E (R9A09G047) variant to the existing RZ/V2H System
Controller (SYS) binding as both IPs are very similar.

They however have different SoC IDs, RZ/G3E has VSP control register
compared to RZ/V2H SYS IP.  Hence introduce a new compatible string
renesas,r9a09g047-sys to handle these differences.

Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: John Madieu <john.madieu.xa@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/20250123170508.13578-3-john.madieu.xa@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>