Add CUDA FLOP hint to GCF_DNA
Add CUDA FLOP hint to GCF_DNA

The annotation is purely based on instrumented measurements, exact to
about 1% for the parameters. Note that I haven't checked whether it
stays valid for different parameters.

SKA-ScienceDataProcessor/RC,SKA-ScienceDataProcessor/RC,SKA-ScienceDataProcessor/RC,SKA-ScienceDataProcessor/RC,SKA-ScienceDataProcessor/RC