Currently, the code for getting umem and kmem buffers exist many files,
this patch adds a group interfaces to simplify the buffers getting flow.
Signed-off-by: NXi Wang <wangxi11@huawei.com>
Signed-off-by: NLijun Ou <oulijun@huawei.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>