ub: uburma support query vf status and write in cdev

driver inclusion
category: feature
bugzilla: NA
CVE: NA

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Uburma support query vf status and write in cdev.
Uburma will query vf status when uburma device creates, and write port
related attrs under /dev/uburma/<ubc_dev->dev_name>/vf*

Signed-off-by: Guoxin Qian <qianguoxin@huawei.com>
Signed-off-by: Yizhen Fan <fanyizhen@huawei.com>