dt-bindings: arm: ti: Add BeaglePlay

This board is based on ti,am625

https://beagleplay.org/
https://git.beagleboard.org/beagleplay/beagleplay

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>
Reviewed-by: Dhruva Gole <d-gole@ti.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230316152143.2438928-2-nm@ti.com
Co-developed-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>

Author: RobertCNelson

Documentation/devicetree/bindings/arm/ti/k3.yaml

@@ -28,6 +28,7 @@ properties:
       - description: K3 AM625 SoC
         items:
           - enum:
+              - beagle,am625-beagleplay
               - ti,am625-sk
           - const: ti,am625