introduce a "ln_top" logical to call or not TOP routines when code is compiled with TOP directory and "key_top" CPP key
We propose to introduce a new namelist logical ln_top
to call or not TOP routines when the code is compiled with TOP directory and key_top
CPP key (as it is done with nn_ice
when compiled with ICE directory and key_si3
CPP key).
This would avoid duplications of configurations with/without BGC and facilitate operational systems development and maintenance.