dt-bindings: iio: light: ltr501: Add proximity-near-level

This value inidcates the proximity level that should be considered
"close".

Signed-off-by: Nikita Travkin <[e-mail]>
Reviewed-by: Rob Herring <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Jonathan Cameron <[e-mail]>

Documentation/devicetree/bindings/iio/light/liteon,ltr501.yaml

···
 maintainers:
   - Nikita Travkin <[e-mail]>
 
+allOf:
+  - $ref: ../common.yaml#
+
 properties:
   compatible:
     enum:
···
 
   interrupts:
     maxItems: 1
+
+  proximity-near-level: true
 
 additionalProperties: false
 
···
         light-sensor@23 {
             compatible = "liteon,ltr559";
             reg = <0x23>;
+            proximity-near-level = <75>;
+
             vdd-supply = <&pm8916_l17>;
             vddio-supply = <&pm8916_l6>;