arm64: dts: qcom: sm8550: Fix the aoss_qmp node name

The proper name for it is power-management. Currently, with the node
name being power-controller, the bindings check fails due to the
property #power-domain-cells missing.

Fixes: ffc50b2d ("arm64: dts: qcom: Add base SM8550 dtsi")
Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
Reviewed-by: Sai Prakash Ranjan <quic_saipraka@quicinc.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230127131441.1157679-1-abel.vesa@linaro.org