net: hns3: fix some logs

driver inclusion
category: bugfix
bugzilla: NA
CVE: NA

The printed data pfc_en and pfc_map need to be displayed in
hexadecimal notation, and the end of printed string needs to
be add "\n", this patch fixes them.

Feature or Bugfix:Bugfix

Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Reviewed-by: lipeng <lipeng321@huawei.com>
Reviewed-by: linyunsheng <linyunsheng@huawei.com>
Reviewed-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>