In case that there is an unsupported band, the ie will be
unallocated and the free will crash.

Cc: stable@vger.kernel.org
Signed-off-by: NDavid Spinadel <david.spinadel@intel.com>
Reviewed-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>