dt-bindings: arm: rockchip: Add Radxa E52C

Add devicetree binding for the Radxa E52C.

Radxa E52C is a compact network computer based on the Rockchip RK3582
SoC.

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: FUKAUMI Naoki <naoki@radxa.com>
Link: https://lore.kernel.org/r/20241226024630.13702-2-naoki@radxa.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

Author: RadxaNaoki

Documentation/devicetree/bindings/arm/rockchip.yaml

@@ -828,6 +828,12 @@ properties:
           - const: radxa,e20c
           - const: rockchip,rk3528
 
+      - description: Radxa E52C
+        items:
+          - const: radxa,e52c
+          - const: rockchip,rk3582
+          - const: rockchip,rk3588s
+
       - description: Radxa Rock
         items:
           - const: radxa,rock