dt-bindings: power: reset: qcom-pon: Add new compatible "qcom,pmk8350-pon"

Add a new compatible string "qcom,pmk8350-pon" for GEN3 PMIC PON
peripherals and update "reg" property.
Also, Add an optional "reg-names" property to differentiate between
GEN1/GEN2 and GEN3 peripherals. GEN1/GEN2 peripherals only need one
register address to be specified (e.g. "pon") whereas GEN3 peripherals
can have two register addresses specified ("hlos", "pbs").

Signed-off-by: David Collins <quic_collinsd@quicinc.com>
Signed-off-by: Anjelique Melendez <quic_amelende@quicinc.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>