arm64: dts: ipq8074: Use the A53 PMU compatible

IPQ8074 has A53 cores, so lets use the corresponding PMU compatible.

Signed-off-by: Kathiravan T <kathirav@codeaurora.org>
Link: https://lore.kernel.org/r/1597642116-15902-1-git-send-email-kathirav@codeaurora.org


Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>