Tidy up duplication of MIN/MAX fallback implementations (#20236)

quantum/velocikey.c

@@ -2,13 +2,7 @@
 #include "timer.h"
 #include "eeconfig.h"
 #include "eeprom.h"
-
-#ifndef MIN
-#    define MIN(a, b) (((a) < (b)) ? (a) : (b))
-#endif
-#ifndef MAX
-#    define MAX(a, b) (((a) > (b)) ? (a) : (b))
-#endif
+#include "util.h"
 
 #define TYPING_SPEED_MAX_VALUE 200
 uint8_t typing_speed = 0;