dt-bindings: pinctrl: qcom,sc7280-lpass-lpi: add bias-bus-hold

The existing SC7280 LPASS pin controller nodes use bias-bus-hold, so
allow it.  Squash also blank lines for readability.

Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220927153429.55365-12-krzysztof.kozlowski@linaro.org


Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>