RDMA/qedr: Remove duplicate assignments of va

Avoid double assignment of iwqp->ietf_mem.va.

Signed-off-by: Minjie Du <duminjie@vivo.com>
Link: https://lore.kernel.org/r/20230705031849.2443-1-duminjie@vivo.com


Signed-off-by: Leon Romanovsky <leon@kernel.org>