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.com


Signed-off-by: Kamal Heib <kamalheib1@gmail.com>
Acked-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>