MLBEDSW-10424: Fallback to Conv2D for ReduceSum when Rescale is unavailable
- Added former fallback mechanism to replace ReduceSum with a 1x1 Conv2D operation when Rescale is not available
Change-Id: I4b2a26a80fc2e6de3262217c29094532306417a5 Signed-off-by: Johan Alfvén johan.alfven@arm.com