network_mgmt: Added the UB network management driver.

driver inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I88WJE


CVE: NA

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UB is a new protocol. The implementation principle and packet format
of UB are different from those of Ethernet. The existing network
management protocol does not support UB. A new protocol needs to
be developed to adapt to UB.

So this patch adds network management drivers to provide the overall
framework for these network management protocols.

Signed-off-by: Gang Zhang <gang.zhang@huawei.com>
Signed-off-by: Jiaxuan Xie <xiejiaxuan@huawei.com>
Signed-off-by: Wenwu Yao <yaowenwu1@huawei.com>