arm64: dts: qcom: Introduce the SC8180x platform

Introduce a base dtsi for the Qualcomm SC8180x platform, with CPUs,
global clock controller, SMMU, rpmh clocks, rpmh power-domains,
CPUfreq etc

Signed-off-by: Bjorn Andersson <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>
Signed-off-by: Bjorn Andersson <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

Author: andersson