Allow ENABLED(b) to work with "true" and "false"

Marlin/macros.h

@@ -17,9 +17,11 @@
 
 // Macros to support option testing
 #define _CAT(a, ...) a ## __VA_ARGS__
-#define SWITCH_ENABLED_0 0
-#define SWITCH_ENABLED_1 1
-#define SWITCH_ENABLED_  1
+#define SWITCH_ENABLED_false 0
+#define SWITCH_ENABLED_true  1
+#define SWITCH_ENABLED_0     0
+#define SWITCH_ENABLED_1     1
+#define SWITCH_ENABLED_      1
 #define ENABLED(b) _CAT(SWITCH_ENABLED_, b)
 #define DISABLED(b) (!_CAT(SWITCH_ENABLED_, b))