udaddy: Remove support for port space IB

udaddy: Remove support for port space IB

UD support for the IB port space requires that the application
use rdma_create_ep, rather than rdma_create_id.  However, using
rdma_create_ep results in address and route resolution being
performed synchronously as part of the rdma_create_ep call.
Since udaddy is an example, we want to show how it can be used
with asynchronous events.  So, rather than update udaddy to
use rdma_create_ep in order to support the IB port space, it
would be better to remove that support.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>