arm64: dts: amlogic: meson-g12b-odroid-go-ultra: fix rk818 pmic properties

Fixes:
pmic@1c: '#clock-cells' is a required property
pmic@1c: 'switch-supply' does not match any of the regexes: 'pinctrl-[0-9]+'

The switch supply is described by vcc9-supply per bindings documentation.

Link: https://lore.kernel.org/r/20230124-b4-amlogic-bindings-fixups-v1-14-44351528957e@linaro.org


Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>