mfd: qcom-spmi-pmic: Add pm8953 compatible

Document the compatible for pm8953 as found in msm8953.
Signed-off-by: Luca Weiss <luca@z3ntu.xyz>
Acked-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20220112194118.178026-5-luca@z3ntu.xyz

Documentation/devicetree/bindings/mfd/qcom,spmi-pmic.txt

@@ -35,6 +35,7 @@ Required properties:
                    "qcom,pm8916",
                    "qcom,pm8941",
                    "qcom,pm8950",
+                   "qcom,pm8953",
                    "qcom,pm8994",
                    "qcom,pm8998",
                    "qcom,pma8084",