dt-bindings: opp: opp-v2-kryo-cpu: Add missing 'cache-unified' property in example

The examples' cache nodes are incomplete as 'cache-unified' is a
required cache property for unified caches which an L2 cache certainly
is.

Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>

Documentation/devicetree/bindings/opp/opp-v2-kryo-cpu.yaml

@@ -106,6 +106,7 @@ examples:
                 L2_0: l2-cache {
                     compatible = "cache";
                     cache-level = <2>;
+                    cache-unified;
                 };
             };
 
@@ -140,6 +141,7 @@ examples:
                 L2_1: l2-cache {
                     compatible = "cache";
                     cache-level = <2>;
+                    cache-unified;
                 };
             };