ub: uburma add ioctl file ops impls for jfae event.

driver inclusion
category: feature
bugzilla: NA
CVE: NA

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Uburma add ioctl file ops impls for jfae event.

Currently ioctl ops will only handle cmd get async event.

get async event: get the specific num of async events polled by jfae
poll ops.

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