Allows Flex Filters to be installed.

The previous restriction to the types of filters that can be installed
can now be lifted.
Signed-off-by: NVinicius Costa Gomes <vinicius.gomes@intel.com>
Tested-by: NDvora Fuxbrumer <dvorax.fuxbrumer@linux.intel.com>
Signed-off-by: NTony Nguyen <anthony.l.nguyen@intel.com>