net: hns: fix the comments style issue

Networking block comments don't use an empty /* line,
use /* Comment...
This patch fix the comments style issue.

Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>