dt-bindings: iio: light: stk33xx: add compatible for stk3013

STK3013 is a proximity sensor by Sensortek, bearing chipid of 0x31. Despite
being marketed as a proximity sensor, it also appears to have ambient
light sensing capabilities.

The part is fully compatible with the existing implementation of the
device driver. Add the compatible string of stk3013 to the existing
list, with a fallback of stk3310.
Signed-off-by: Kaustabh Chakraborty <kauschluss@disroot.org>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/20240727-stk3310-v4-3-02497b1407ba@disroot.orgSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Documentation/devicetree/bindings/iio/light/stk33xx.yaml

@@ -18,10 +18,15 @@ allOf:
 
 properties:
   compatible:
-    enum:
-      - sensortek,stk3310
-      - sensortek,stk3311
-      - sensortek,stk3335
+    oneOf:
+      - enum:
+          - sensortek,stk3310
+          - sensortek,stk3311
+          - sensortek,stk3335
+      - items:
+          - enum:
+              - sensortek,stk3013
+          - const: sensortek,stk3310
 
   reg:
     maxItems: 1