net:spnic:Clear the flag of CSUM and TSO when VXLAN is not supported

Ramaxel inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I4J0GH


CVE: NA

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When the firmware does not support VXLAN offload,
 clear the flag of CSUM and TS0.

Signed-off-by: Yanling Song <songyl@ramaxel.com>
Reviewed-by: Xu <Yun&lt;xuyun@ramaxel.com>
Acked-by: Xie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>