rdma/ucm: name changes to indicate only IP addresses supported

rdma/ucm: name changes to indicate only IP addresses supported

Several commands into the RDMA CM from user space are
restricted to supporting addresses which fit into a sockaddr_in6
structure: bind address, resolve address, and join multicast.

With the addition of AF_IB, we need to support addresses
which are larger than sockaddr_in6.  This will be done by
adding new commands that exchange address information using
sockaddr_storage.  However, to support existing applications,
we maintain the current commands and structures, but rename
them to indicate that they only support IPv4 and v6 addresses.

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