RDMA/cxgb4: Remove useless assignments

If go to the err label, abort will be assigned a value of 1, so there is
no need to assign a value of 1 here.

Link: https://lore.kernel.org/r/1621503577-18093-1-git-send-email-tiantao6@hisilicon.com


Signed-off-by: Tian Tao <tiantao6@hisilicon.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>