dt-bindings: qcom-qce: Add 'iommus' to optional properties

Add the missing optional property - 'iommus' to the
device-tree binding documentation for qcom-qce crypto IP.

This property describes the phandle(s) to apps_smmu node with sid mask.

Cc: Bjorn Andersson <andersson@kernel.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Tested-by: Jordan Crouse <jorcrous@amazon.com>
Signed-off-by: Bhupesh Sharma <bhupesh.sharma@linaro.org>
Signed-off-by: Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Documentation/devicetree/bindings/crypto/qcom-qce.yaml

@@ -32,6 +32,12 @@ properties:
       - const: bus
       - const: core
 
+  iommus:
+    minItems: 1
+    maxItems: 8
+    description:
+      phandle to apps_smmu node with sid mask.
+
   interconnects:
     maxItems: 1
     description:
@@ -72,4 +78,8 @@ examples:
         clock-names = "iface", "bus", "core";
         dmas = <&cryptobam 2>, <&cryptobam 3>;
         dma-names = "rx", "tx";
+        iommus = <&apps_smmu 0x584 0x0011>,
+                 <&apps_smmu 0x586 0x0011>,
+                 <&apps_smmu 0x594 0x0011>,
+                 <&apps_smmu 0x596 0x0011>;
     };