dt-bindings: mfd: qcom,spmi-pmic: Add nvram function

Add an 'nvram' pattern property and a reference to the corresponding
SDAM DT schema.
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20230320135710.1989-4-johan+linaro@kernel.org

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

@@ -138,6 +138,10 @@ patternProperties:
     type: object
     $ref: /schemas/pinctrl/qcom,pmic-gpio.yaml#
 
+  "^nvram@[0-9a-f]+$":
+    type: object
+    $ref: /schemas/nvmem/qcom,spmi-sdam.yaml#
+
   "pon@[0-9a-f]+$":
     type: object
     $ref: /schemas/power/reset/qcom,pon.yaml#