UBL: Change the name of ub netdev to ubl.

driver inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I8GIXF


CVE: NA

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The names of traditional Ethernet network devices are
the same as those of Layer 2 protocols. Similarly, for
the ub network device, the network device name should
be the same as the Layer 2 protocol ubl.

This patch changes the name of the ub network device
to ubl.

Signed-off-by: Haibin Lu <luhaibin10@hisilicon.com>