Create if_lib package containing all the modules and adapt the *.py files
to import each other using the intra-package references.
The idea behind a package is to invoke test.py either by permanently
modifying PYTHONPATH in user profile via adding path to $RIOTBASE/dist/tests
or make temporary PYTHONPATH changes during the invocation:
PYTHONPATH=$PYTHONPATH:$RIOTBASE/dist/tests python3 test.py
Leave periph_i2c_if.py in the same folder as test.py as this file is
just a Python wrapper around periph specific main.c.
Update BPT memory map. Use definitions generated with the latest code
generator. Both routine names and mapping have changed.
Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>
