fix(motor-control): only add a delay before disengaging motor if ebra…

…ke exists (#734)

* fix(head): engage head ebrake at boot (#732)

* fix(motor-control): z stage falls after being disengaged (#733)

* only adds delay if there is an ebrake

motor-control/firmware/stepper_motor/motor_hardware.cpp

@@ -23,6 +23,7 @@ void MotorHardware::activate_motor() {
 void MotorHardware::deactivate_motor() {
     if (pins.ebrake.has_value()) {
         gpio::set(pins.ebrake.value());
+        motor_hardware_delay(10);
     }
     motor_hardware_delay(10);
     gpio::reset(pins.enable);