dt-bindings: clocks: Fix typo in the H6 compatible

Even though both the driver and the device trees all use the
allwinner,sun50i-h6-de3-clk, we documented the compatible as
allwinner,sun50i-h6-de2-clk in the binding. Let's fix this.
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Link: https://lore.kernel.org/r/20210901091852.479202-10-maxime@cerno.tech

Documentation/devicetree/bindings/clock/allwinner,sun8i-a83t-de2-clk.yaml

@@ -24,7 +24,7 @@ properties:
       - const: allwinner,sun8i-v3s-de2-clk
       - const: allwinner,sun50i-a64-de2-clk
       - const: allwinner,sun50i-h5-de2-clk
-      - const: allwinner,sun50i-h6-de2-clk
+      - const: allwinner,sun50i-h6-de3-clk
       - items:
           - const: allwinner,sun8i-r40-de2-clk
           - const: allwinner,sun8i-h3-de2-clk