No. I say no, because deployment servers just don't work that way.
You can have multiple deployment servers, but the secondary server is a client of the primary, and clients only communicate with either the primary or secondary, but not both.
Here are a couple of links that you might find helpful:
http://wiki.splunk.com/Deploy:DeploymentServer
http://answers.splunk.com/answers/37649/multiple-deployment-servers-configuration
Why would you want to have two sources of configurations?