arm64: dts: renesas: r9a08g045: Add PCIe node

arm64: dts: renesas: r9a08g045: Add PCIe node

The RZ/G3S SoC has a variant (R9A08G045S33) which supports PCIe. Add the
PCIe node.

Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Acked-by: Manivannan Sadhasivam <mani@kernel.org>
Link: https://patch.msgid.link/20251119143523.977085-4-claudiu.beznea.uj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>