[OAI-UE] MIMO fixes + disabling MIB/SIB decoding on connected mode

openair1/PHY/INIT/lte_init.c

openair1/PHY/LTE_TRANSPORT/dci.c

openair1/PHY/LTE_TRANSPORT/dci_tools.c

openair1/PHY/LTE_TRANSPORT/dlsch_demodulation.c

openair1/PHY/LTE_TRANSPORT/dlsch_llr_computation.c

openair1/PHY/defs.h

openair1/SCHED/phy_procedures_lte_ue.c