RDMA/ocrdma: Fix out of bounds index check in query pkey

The pkey table size is one element, index should be tested for > 0 instead
of > 1.

Fixes: fe2caefc

 ("RDMA/ocrdma: Add driver for Emulex OneConnect IBoE RDMA adapter")
Signed-off-by: Gal Pressman <galpress@amazon.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>