ub: uburma add cmd import/unimport jfr implementation.

driver inclusion
category: feature
bugzilla: NA
CVE: NA

--------------------------------

Uburma add implementations of handling import/unimport jfc cmd from
user layer.

This will make kernel possible to handle urma_import_jfr/urma_unimport_jfr
api in user-layer urma.

Import_jfr will finally call ubcore_import_jfr. The created target
jfr (tjfr) will be related to a uobj.
Unimport_jfr will delete the tjfr-related uobj.
In uobj destroy function, it will call ubcore_unimport_jfr.

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