ub: support uburma to query device attr and store attrs in cdev.

driver inclusion
category: feature
bugzilla: NA
CVE: NA

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support uburma to query device attr and write attrs in cdev.

Currently only support uburma get and store eid.

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