cma, scm, ucm: allow EP (QP) creation without EVD (CQ)

cma, scm, ucm: allow EP (QP) creation without EVD (CQ)

Provide ability to create a EP/QP with no EVD/CQ on either the
request or receive queue. The current implementation allows on
receive queue but not request queue. Not all ofa devices support
a null CQ so if necessary create a dummy CQ at the time of
QP creation. Also, if no CQ is specified set appropriate QP
max wr/sge attributes to zero.

Signed-off-by: Arlin Davis <arlin.r.davis@intel.com>