A lot of the scanning related code is duplicated between 3945 and agn. Let's
use the iwlcore one and get rid of the 3945.
Signed-off-by: NSamuel Ortiz <samuel.ortiz@intel.com>
Signed-off-by: NReinette Chatre <reinette.chatre@intel.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>