dt-bindings: qcom-pmic-gpio: Add PM7250B and PM8450 bindings

Update the Qualcomm Technologies, Inc. PMIC GPIO binding documentation
to include compatible strings for PM7250B and PM8450 PMICs.

Signed-off-by: Anjelique Melendez <quic_amelende@quicinc.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220912210624.4527-5-quic_amelende@quicinc.com


Signed-off-by: Linus Walleij <linus.walleij@linaro.org>