RDMA/irdma: Fix return error sign from irdma_modify_qp

There is a typo in the returned error code sign from irdma_modify_qp()
when the attr_mask is not supported - Fix it.

Fixes: b48c24c2 ("RDMA/irdma: Implement device supported verb APIs")
Link: https://lore.kernel.org/r/20210607221543.254144-1-kamalheib1@gmail.comSigned-off-by: Kamal Heib <kamalheib1@gmail.com>
Acked-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

drivers/infiniband/hw/irdma/verbs.c

@@ -1472,7 +1472,7 @@ int irdma_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, int attr_mask,
 	unsigned long flags;
 
 	if (attr_mask & ~IB_QP_ATTR_STANDARD_BITS)
-		return ~EOPNOTSUPP;
+		return -EOPNOTSUPP;
 
 	ctx_info = &iwqp->ctx_info;
 	offload_info = &iwqp->iwarp_info;