dt-bindings: leds: sgm3140: Document richtek,rt5033 compatible

Add devicetree binding for Richtek RT5033 Flash LED charge pump used for
camera flash LEDs.
Signed-off-by: Raymond Hackley <raymondhackley@protonmail.com>
Link: https://lore.kernel.org/r/20230602131009.260239-1-raymondhackley@protonmail.comSigned-off-by: Lee Jones <lee@kernel.org>

Documentation/devicetree/bindings/leds/leds-sgm3140.yaml

@@ -20,6 +20,7 @@ properties:
   compatible:
     enum:
       - ocs,ocp8110
+      - richtek,rt5033-led
       - sgmicro,sgm3140
 
   enable-gpios: