Implement SERVO_DELAY as array

This modify give SERVO_DELAY x servo basis

Marlin/example_configurations/Malyan/M150/Configuration.h

@@ -1623,7 +1623,7 @@
 // Delay (in milliseconds) before the next move will start, to give the servo time to reach its target angle.
 // 300ms is a good value but you can try less delay.
 // If the servo can't reach the requested position, increase it.
-#define SERVO_DELAY 300
+#define SERVO_DELAY { 300 }
 
 // Servo deactivation
 //