MLBEDSW-10634: Handle shapeless Conv2D/DepthwiseConv2D better
- Allow shapeless Convolutions in semantics checker.
- Check for valid shape when calculating padding.
- Check for valid shape when calculating output shape.
Signed-off-by: Johan Gunnarsson johan.gunnarsson@arm.com Change-Id: Ib7d55fcd4f3323f6de01396d56c061f3ab3c5805