dt-bindings: mfd: qcom-spmi-pmic: Document PM8937 PMIC

Add bindings for PM8937 PMIC (qcom,pm8937). This PMIC is found in
boards with MSM8917, MSM8937, MSM8940 and APQ variants.

Reviewed-by: Krzysztof Kozlowski <[email protected]>
Signed-off-by: Dang Huynh <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Lee Jones <[email protected]>

Author: Danct12

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

@@ -66,6 +66,7 @@ properties:
           - qcom,pm8841
           - qcom,pm8909
           - qcom,pm8916
+          - qcom,pm8937
           - qcom,pm8941
           - qcom,pm8950
           - qcom,pm8953