dt-bindings: arm: amlogic: Add Ugoos AM3

The Ugoos AM3 is a small set-top box based on the Amlogic S912 SoC.

  https://ugoos.com/ugoos-am3-16g

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: J. Neuschäfer <j.ne@posteo.net>
Link: https://lore.kernel.org/r/20250613-ugoos-am3-v3-1-f8a43e6bbfdb@posteo.net
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>

Author: neuschaefer

Documentation/devicetree/bindings/arm/amlogic.yaml

@@ -135,6 +135,7 @@ properties:
               - minix,neo-u9h
               - nexbox,a1
               - tronsmart,vega-s96
+              - ugoos,am3
               - videostrong,gxm-kiii-pro
               - wetek,core2
           - const: amlogic,s912