arm64: dts: rockchip: Fix vccio4-supply on rk3566-pinetab2

arm64: dts: rockchip: Fix vccio4-supply on rk3566-pinetab2

Page 13 of the PineTab2 v2 schematic dd 20230417 shows VCCIO4's power
source is VCCIO_WL. Page 19 shows that VCCIO_WL is connected to
VCCA1V8_PMU, so fix the PineTab2 dtsi to reflect that.

Fixes: 1b7e19448f8f ("arm64: dts: rockchip: Add devicetree for Pine64 PineTab2")
Cc: stable@vger.kernel.org
Reviewed-by: Dragan Simic <dsimic@manjaro.org>
Signed-off-by: Diederik de Haas <diederik@cknow-tech.com>
Link: https://patch.msgid.link/20251027155724.138096-1-diederik@cknow-tech.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>