spi: dt-bindings: Add rockchip,rk3576-spi compatible

It is compatible with the rockchip,rk3066-spi SPI core.
Signed-off-by: Detlev Casanova <detlev.casanova@collabora.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://patch.msgid.link/20240903152308.13565-8-detlev.casanova@collabora.comSigned-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/spi/spi-rockchip.yaml

@@ -35,6 +35,7 @@ properties:
               - rockchip,rk3368-spi
               - rockchip,rk3399-spi
               - rockchip,rk3568-spi
+              - rockchip,rk3576-spi
               - rockchip,rk3588-spi
               - rockchip,rv1126-spi
           - const: rockchip,rk3066-spi