RDMA/ocrdma: Delete AH table if ocrdma_init_hw fails after AH table creation

Cleanup the AH table in error path, if HW initialization fails
after AH table creation.

Signed-off-by: Devesh Sharma <devesh.sharma@emulex.com>
Signed-off-by: Selvin Xavier <selvin.xavier@emulex.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>