net: hns3: delete blank lines and space for cleanup

driver inclusion
category: cleanup
bugzilla: NA
CVE: NA

This patch deletes some unnecessary blank lines, and deletes one
space to make code align to preceding line.

Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Reviewed-by: Peng Li <lipeng321@huawei.com>
Reviewed-by: Zhong Zhaohui <zhongzhaohui@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>