arm64: dts: qcom: pmk8350: Use the correct PON compatible

A special compatible was introduced for PMK8350 both in the driver and
the bindings to facilitate for 2 base registers (PBS & HLOS). Use it.

Fixes: b2de4313 ("arm64: dts: qcom: pmk8350: Add peripherals for pmk8350")
Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230213212930.2115182-1-konrad.dybcio@linaro.org