ub: uburma add cmd modify/delete jfc implementation.

driver inclusion
category: feature
bugzilla: NA
CVE: NA

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Uburma add implementations of handling modify/delete jfc cmd from
user layer.

This will make kernel possible to handle urma_modify_jfc/urma_delete_jfy
api in user-layer urma.

Modify_jfc will finally call ubcore_modify_jfc.
Delete_jfc will delete the jfc-related uobj. In uobj destroy function, it
will call ubcore_delete_jfc.

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