arm64: dts: qcom: add missing AOSS QMP compatible fallback

The AOSS QMP bindings expect all compatibles to be followed by fallback
"qcom,aoss-qmp" because all of these are actually compatible with each
other.  This fixes dtbs_check warnings like:

  sm8250-hdk.dtb: power-controller@c300000: compatible: ['qcom,sm8250-aoss-qmp'] is too short

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220504131923.214367-6-krzysztof.kozlowski@linaro.org