arm64: dts: qcom: sc8180x-pmics: add missing qcom,spmi-gpio fallbacks

The GPIO children of PMICs should use qcom,spmi-gpio fallback:

  sc8180x-primus.dtb: pmic@0: gpio@c000:compatible: ['qcom,pmc8180-gpio'] is too short

Fixes: d3302290 ("arm64: dts: qcom: sc8180x: Add pmics")
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Vinod Koul <vkoul@kernel.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Link: https://lore.kernel.org/r/20230720083500.73554-1-krzysztof.kozlowski@linaro.org


Signed-off-by: Bjorn Andersson <andersson@kernel.org>