arm64: dts: qcom: sc7180: Use QMP property to control load state

Use the Qualcomm Mailbox Protocol (QMP) property to control the load
state resources on SC7180 SoCs and drop deprecated power-domains exposed
by AOSS QMP node.

Signed-off-by: Sibi Sankar <sibis@codeaurora.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/1631800770-371-6-git-send-email-sibis@codeaurora.org