Conflicts:
	openair1/PHY/NR_UE_TRANSPORT/nr_ulsch_ue.c
	openair2/LAYER2/NR_MAC_UE/nr_ue_procedures.c
	openair2/NR_UE_PHY_INTERFACE/NR_IF_Module.c

because round 0 could be skipped if no pusch signal detected

The name NR_UE_list_t is misleading: beyond being a simple "list", this
structure carries all/most UE-related MAC information. If at all, it is
a container for multiple lists. The next commit introduces a
NR_UE_list_t structure that organizes UEs in lists such that it is
easier to go through the UEs.