regulator: dt-bindings: active-semi,act8846: correct supplies

regulator: dt-bindings: active-semi,act8846: correct supplies

Regulator supplies are per-device, not per regulator, so they are
expected to be present in device node.  Moving them to proper place
allows to simplify a lot, because now none of the regulators differ.

This also fixes dtbs_check warnings like:

  rk3368-evb-act8846.dtb: act8846@5a: 'inl1-supply', 'inl2-supply', 'inl3-supply', 'vp1-supply',
    'vp2-supply', 'vp3-supply', 'vp4-supply' do not match any of the regexes: 'pinctrl-[0-9]+'

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230725124629.150113-3-krzysztof.kozlowski@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>