net: hns3: fix some coding style found by codereview

driver inclusion
category: bugfix
bugzilla: NA
CVE: NA

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This patch fixes the following two points:
1. Net device can not change mtu with stream. So if 'net stop' failed,
mtu setting should abort. this patch fixes this.
2. Fixes some coding style with the location of parameter.

Signed-off-by: Guojia Liao <liaoguojia@huawei.com>
Signed-off-by: shenhao <shenhao21@huawei.com>
Reviewed-by: Zhong Zhaohui <zhongzhaohui@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>