arm64: dts: qcom: msm8996: qcom,controlled-remotely is boolean

QCOM BAM parses property `qcom,controlled-remotely` as a boolean,
adjust dts to reflect that.

Discovered while converting text documentation into yaml format.

Signed-off-by: David Heidelberg <david@ixit.cz>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20211220145526.49102-1-david@ixit.cz