dt-bindings: pinctrl: qcom,pmic-gpio: Add PMXR2230 and PM6450 support

Update the Qualcomm Technologies, Inc. PMIC GPIO binding documentation
to include compatible strings for PMXR2230 and PM6450 PMICs.

Signed-off-by: David Collins <quic_collinsd@quicinc.com>
Signed-off-by: Anjelique Melendez <quic_amelende@quicinc.com>
Acked-by: Krzystof Kozlowski <krzystof.kozlowski@linaro.org>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Message-ID: <20240326220628.2392802-2-quic_amelende@quicinc.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>