arm64: dts: qcom: ipq9574: Add support for APSS clock controller

Add the APCS & A73 PLL nodes to support CPU frequency scaling.

Signed-off-by: Devi Priya <quic_devipriy@quicinc.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230406061314.10916-5-quic_devipriy@quicinc.com