RDMA/hns: Remove redundant qpc setup operations

Before calling modify_qp_reset_to_init(), the entire qpc mask has been
cleared, so it is no longer necessary to clear the specific fields in the
mask.

Link: https://lore.kernel.org/r/1584674622-52773-9-git-send-email-liweihang@huawei.comSigned-off-by: Lang Cheng <chenglang@huawei.com>
Signed-off-by: Weihang Li <liweihang@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>