uvp/av: change create/modify calls to take SGID index

uvp/av: change create/modify calls to take SGID index

The uvp requires the SGID index to create/modify address handles.
Modify the API and UVPs to take the SGID index as input.  This avoids
the UVP needing to cache the CA attributes, which can lead to accessing
a stale GID table.  The SGID index is passed into the UVP through the
resv1 field of the GRH.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
git-svn-id: svn://openib.tc.cornell.edu/gen1@1444 ad392aa1-c5ef-ae45-8dd8-e69d62a5ef86