arm64: dts: qcom: sm6115: Add cpufreq-hw support

Add cpufreq-hw node and assign qcom,freq-domain properties
to CPUs to enable CPU clock scaling.

Signed-off-by: Adam Skladowski <a39.skl@gmail.com>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221130200950.144618-4-a39.skl@gmail.com