Add cpi_enable to azure deployment (#1045)

Signed-off-by: Chin-Ya Huang <[email protected]>

Author: c3y1huang

adoc/deployment-azure.adoc

@@ -191,6 +191,13 @@ caasp_registry_code = "<CAASP_REGISTRATION_CODE>"
 This is required so all the deployed nodes can automatically register
 with {scc} and retrieve packages.
 
+You can also enable Cloud Provider Integration with Azure.
++
+----
+# Enable CPI integration with Azure
+cpi_enable = true
+----
+
 Now you can deploy the nodes by running:
 
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