[ofw] [RFC] [PATCH] verbs/cq: set competion handlers per CQ

[Sean Hefty]

>The underlying HCA drivers support completion handlers per CQ.  Expose
>this capability through the kernel verb channel interface.  This allows the
>HCA driver to callback the user directly, rather than going through
>indirect calls.

Just to clarify, I'm proposing this for the WinVerbs branch now, and the main
branch only after the WinVerb branch is ready for merging.  I will make a
similar change to the connectx driver after I add it to the winverb branch.

- Sean