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/RRC/LTE/L2_interface.c

@@ -299,7 +299,7 @@ mac_rrc_data_ind(
   const uint8_t        *sduP,
   const sdu_size_t      sdu_lenP,
   const uint8_t         mbsfn_sync_areaP,
-  const boolean_t   brOption
+  const bool            brOption
 )
 //--------------------------------------------------------------------------
 {