dt-bindings: timer: rk-timer: Add rktimer for rv1126

Add rockchip timer compatible string for rockchip rv1126.
Signed-off-by: Jagan Teki <jagan@edgeble.ai>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20221123183124.6911-3-jagan@edgeble.aiSigned-off-by: Daniel Lezcano <daniel.lezcano@kernel.org>

Documentation/devicetree/bindings/timer/rockchip,rk-timer.yaml

@@ -17,6 +17,7 @@ properties:
       - items:
           - enum:
               - rockchip,rv1108-timer
+              - rockchip,rv1126-timer
               - rockchip,rk3036-timer
               - rockchip,rk3128-timer
               - rockchip,rk3188-timer