ub: uburma add jetty and event related uobj def and event api def

driver inclusion
category: feature
bugzilla: NA
CVE: NA

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Uburma add jetty and event related uobj definition, and also uburma event
api definition.

Jetty is a type idr uobj in uburma. Event is a type of fd uobj in uburma.

In uburma we need to handle completion events and async events so that
uburma can report events to user.

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