[IBAL, MTHCA] fix the work with av with valid grh. [mlnx: 3077]

[IBAL, MTHCA] fix the work with av with valid grh. [mlnx: 3077]

The patch fix the behavior of av verbs in case that sgid isn't found at the gid_table.
Instead of exit with IB_INVALID_GID it sets the index to 0. Please note IB spec 11.2.2.2 regarding av verbs definition.

The patch also used grh.resv2 (rather than resv1) to avoid C4328 warning (improper member alignment).

Signed-off-by: Reuven Amitai reuven@mellanox.co.il
git-svn-id: svn://openib.tc.cornell.edu/gen1@1581 ad392aa1-c5ef-ae45-8dd8-e69d62a5ef86