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

drivers/infiniband/hw/irdma/cm.c

@@ -3627,7 +3627,6 @@ void irdma_free_lsmm_rsrc(struct irdma_qp *iwqp)
 				  iwqp->ietf_mem.size, iwqp->ietf_mem.va,
 				  iwqp->ietf_mem.pa);
 		iwqp->ietf_mem.va = NULL;
-		iwqp->ietf_mem.va = NULL;
 	}
 }