MLBEDSW-10934 Update kernel constraint for Convolutions with IFM2
The constraint of 1x1 kernel is only applicable when IFM2 contains weights, not when IFM2 is used to read accumulators.
Change-Id: I98d2cd65ee750b5a4b8c20d0fefb8d3e94295427 Signed-off-by: Jacob Bohlin jacob.bohlin@arm.com