COMPMID-417 - Added NEFlattenLayer function

Change-Id: I919c3352bf22bb41df2928be291be754c0518d3f
Reviewed-on: http://mpd-gerrit.cambridge.arm.com/89536
Reviewed-by: Pablo Tello <pablo.tello@arm.com>
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
Tested-by: Kaizen <jeremy.johnson+kaizengerrit@arm.com>
4 files changed