subsys/portability/CMSIS: Do not redefine TRUE & FALSE

These macros tend to be defined by too many headers.
Let's guard these definition with ifdefs to avoid
redefining them to practically the same.

Signed-off-by: Alberto Escolar Piedras <alberto.escolar.piedras@nordicsemi.no>

subsys/portability/cmsis_rtos_v2/wrapper.h

@@ -10,8 +10,12 @@
 #include <zephyr/kernel.h>
 #include <cmsis_os2.h>
 
+#ifndef TRUE
 #define TRUE    1
+#endif
+#ifndef FALSE
 #define FALSE   0
+#endif
 
 struct cv2_thread {
 	sys_dnode_t node;