This reverts commit ce14050b, reversing
changes made to 0ada1e9e.

I'm not sure the fixes are correct.

                since two rx threads (even/odd) are used by OAI-UE

Hopefully the right argument is passed to this function.

changed the memory allocation of txdataF and beam_weigths

Beamforming is now only done when necessary. This patch is based on one from enhancement-10-harmony.

reduced the max number of antenna ports to 6 to save memory (we are not using antenna port >5 anyway)
mult_cpx_conj_vector can now also do multiply add
beam_precoding now uses mult_cpx_conj_vector

Conflicts:
	openair1/PHY/MODULATION/beamforming.c

This is the real fix, d5a68178
was not the right solution.

"frame" is not defined, we pass 0 instead.

Maybe not the right solution.

Several various fixes are included. Not sure what component of
the system uses this file.

There is one 'abort' added in case a fscanf fails. It may be a
bit too brutal.

This is not absolutely necessary (the processing is ok),
but the warning is annoying.

Some of them might not be correctly handled.
I put /* TODO: XXX */ where I didn't know if
the fix was correct.

calling the function for FDD case executed code for TDD case.

fixes for precoding (turning off if nb_antennas_tx=1), configuration files, timing advance with 3/4 sampling on 20 MHz, logging in MAC

see issue #177