Use (std) bool instead of custom bool types

OAI is riddled with boolean_t, FALSE, TRUE, etc. This makes no sense, as
there is a standard bool type, and could lead to nasty bugs if a
definition of a bool is non-standard (0 == false, true == !false). This
commit removes all non-standard bools in the whole project.

openair2/LAYER2/MAC/pre_processor.c

@@ -638,7 +638,7 @@ dlsch_scheduler_pre_processor(module_id_t Mod_id,
       LOG_E(MAC, "UE %d has RNTI NOT_A_RNTI!\n", UE_id);
       continue;
     }
-    if (UE_info->active[UE_id] != TRUE) {
+    if (UE_info->active[UE_id] != true) {
       LOG_E(MAC, "UE %d RNTI %x is NOT active!\n", UE_id, rnti);
       continue;
     }