removed minor AVX2 optimizations from 16-bit turbo decoder. had issues for small block lengths in UE.

added fixes to build on odroid/xu4 platform

changes on bugfix-48-L1L2Signaling to build for odroid platform

the branch has been tested to build on x86 platform
- builds for eNB
- can do attach
- can ping external servers

On odroid,
- builds correctly
- eNB fails to come up due to late samples (same as parent branch)


See merge request !31

Add the PCO so that MME allocates the IP address
accordingly. The protocol ID known as "IP address
allocation via NAS signalling" is assigned.

Otherwise, the OAI UE will always has IP address
set to 0.0.0.0

This has tested with OAI eNB with S1 interface using
OAI EPC.

Reference:
http://www.sharetechnote.com/html/Handbook_LTE_ProtocolConfigurationOption.html

This patch is merged with Cedric's patch and tested.
Signed-off-by: Chun-Yeow Yeoh <yeow@tmrnd.com.my>
Signed-off-by: Cedric Roux <Cedric.Roux@eurecom.fr>

Merge branch 'bugfix-48-L1L2signaling' of https://gitlab.eurecom.fr/oai/openairinterface5g into bugfix-48-L1L2signaling