Update qcpon(4) compatibles to match on qcom,pmk8350-pon, which is the updated

Update qcpon(4) compatibles to match on qcom,pmk8350-pon, which is the updated
binding in Linux 6.3 device trees.  While there, remove retrieving the register
address, as the new binding has an additional register with doesn't work with
a single OF_getpropint(), and since we're not using it we don't need to keep it
around.