net: hns3: remove the unnecessary ccflags

driver inclusion
category: other
bugzilla: NA
CVE: NA

----------------------------------

The ccflags removed in this patch shouldn't be in open kernel tree.
Especially for -fstack-protector-strong, there will be a compile error
when CONFIG_STACKPROTECTOR_STRONG isn't enabled.

Signed-off-by: Zhengyuan Liu <liuzhengyuan@tj.kylinos.cn>
Reviewed-by: Hanjun Guo <guohanjun@huawei.com>
Reviewed-by: Zhong Zhaohui <zhongzhaohui@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>