arm64: dts: amlogic: move ao_pinctrl into aobus

arm64: dts: amlogic: move ao_pinctrl into aobus

The AO pinctrl was mis-described as beeing part of AO rti sysctrl, move it
it into aobus like it's also done in GX SoCs, and remove the now invalid
'#address-cells', '#size-cells' & 'ranges from the sys-ctrl@0 node.

This fixes:
sys-ctrl@0: '#address-cells', '#size-cells', 'ranges' do not match any of the regexes: 'pinctrl-[0-9]+'

Tested-by: Christian Hewitt <christianshewitt@gmail.com>
Link: https://lore.kernel.org/r/20240606-topic-amlogic-upstream-bindings-fixes-dts-v1-2-62e812729541@linaro.org
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>