rockchip: add rockchip,rk3128-spi

Add rockchip,rk3128-spi compatible string.
Signed-off-by: NJohan Jonker <jbx6244@gmail.com>
Link: https://lore.kernel.org/r/c05fb9a3-ebf7-adec-e8ca-bd137d157f50@gmail.comSigned-off-by: NMark Brown <broonie@kernel.org>

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

@@ -27,6 +27,7 @@ properties:
       - items:
           - enum:
               - rockchip,px30-spi
+              - rockchip,rk3128-spi
               - rockchip,rk3188-spi
               - rockchip,rk3288-spi
               - rockchip,rk3308-spi