RDMA/hns: Fix comments with non-English symbols

There is a comments with some chinese semicolons that cause encoding
issues each time hns_roc_hw_v2.h was modified from a IDE. So fix this by
using correct symbols.

Link: https://lore.kernel.org/r/1588242691-12913-2-git-send-email-liweihang@huawei.com


Signed-off-by: Weihang Li <liweihang@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>