Got rid of references to "dimensions.h" from physics packages:
use nbp_lon (=iim), nbp_lat (==jjp1) and nbp_lev
from module mod_grid_phy_lmdz (in phy_common) instead.
Added "ioipsl_getin_p_mod.F90" (getin_p routine) in phy_common to
correctly read in parameters from *.def files in a parallel environment.