dt-bindings: crypto: sa2ul: fix a DT binding check warning

DT binding check produces a warning about bad cell size:

Documentation/devicetree/bindings/crypto/ti,sa2ul.example.dt.yaml: example-0: crypto@4e00000:reg:0: [0, 81788928, 0, 4608] is too long
	From schema: python3.6/site-packages/dtschema/schemas/reg.yaml

Fix this by reducing the address sizes for the example to 1 cell from
current 2.

Fixes: 2ce9a729 ("dt-bindings: crypto: Add TI SA2UL crypto accelerator documentation")
Reported-by: Rob Herring <robh@kernel.org>
Cc: Rob Herring <robh@kernel.org>
Cc: devicetree@vger.kernel.org
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Link: https://lore.kernel.org/r/20200825133106.21542-2-t-kristo@ti.comSigned-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/crypto/ti,sa2ul.yaml

@@ -67,7 +67,7 @@ examples:
 
     main_crypto: crypto@4e00000 {
         compatible = "ti,j721-sa2ul";
-        reg = <0x0 0x4e00000 0x0 0x1200>;
+        reg = <0x4e00000 0x1200>;
         power-domains = <&k3_pds 264 TI_SCI_PD_EXCLUSIVE>;
         dmas = <&main_udmap 0xc000>, <&main_udmap 0x4000>,
                <&main_udmap 0x4001>;