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/M2AP/m2ap_common.h

@@ -55,11 +55,6 @@
 # define M2AP_PORT 36423
 #endif
 
-#ifndef TRUE
-#define TRUE 1
-#define FALSE 0
-#endif
-
 extern int asn1_xer_print;
 
 #if defined(ENB_MODE)