acm: Add cache update (removal) mechanism

Adding support for updating ACM cache
with new PRDB in terms if add / remove / modify
cached destination records.

 * note: add / modify operations were already supported,
         remove is added in this patch.

Signed-off-by: Ilya Nelkenbaum <ilyan@mellanox.com>
Signed-off-by: Hal Rosenstock <hal@mellanox.com>