dt-bindings: timer: allwinner,sun4i-a10-timer: Add D1 compatible

Allwinner D1 contains the usual sun4i MMIO timer device. It contains two
timers like other recent SoCs, so it is compatible with the A23 variant.
Signed-off-by: Samuel Holland <samuel@sholland.org>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220725051715.56427-1-samuel@sholland.orgSigned-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

Documentation/devicetree/bindings/timer/allwinner,sun4i-a10-timer.yaml

@@ -20,6 +20,7 @@ properties:
           - allwinner,suniv-f1c100s-timer
       - items:
           - enum:
+              - allwinner,sun20i-d1-timer
               - allwinner,sun50i-a64-timer
               - allwinner,sun50i-h6-timer
               - allwinner,sun50i-h616-timer