ARM: dts: qcom: apq8060: drop incorrect regulator-type

regulator-fixed does not have a "regulator-type" property:

  qcom-apq8060-dragonboard.dtb: regulator-fixed: Unevaluated properties are not allowed ('regulator-type' was unexpected)

Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20230924183914.51414-2-krzysztof.kozlowski@linaro.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>