IB/rdmavt: Add completion queue function stubs

Create stubs for completion queue creation, polling,
resizing, calling for notification, and destroying.

Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/sw/rdmavt/vt.h

@@ -57,5 +57,6 @@
 #include "srq.h"
 #include "mcast.h"
 #include "mmap.h"
+#include "cq.h"
 
 #endif          /* DEF_RDMAVT_H */