config: Update example configs to use rotation_distance

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

config/printer-creality-ender2-2017.cfg

@@ -15,7 +15,8 @@
 step_pin: PD7
 dir_pin: !PC5
 enable_pin: !PD6
-step_distance: .0125
+microsteps: 16
+rotation_distance: 40
 endstop_pin: ^PC2
 position_endstop: 0
 position_max: 165
@@ -25,7 +26,8 @@ homing_speed: 50
 step_pin: PC6
 dir_pin: !PC7
 enable_pin: !PD6
-step_distance: .0125
+microsteps: 16
+rotation_distance: 40
 endstop_pin: ^PC3
 position_endstop: 0
 position_max: 165
@@ -35,7 +37,8 @@ homing_speed: 50
 step_pin: PB3
 dir_pin: PB2
 enable_pin: !PA5
-step_distance: .0025
+microsteps: 16
+rotation_distance: 8
 endstop_pin: ^PC4
 position_endstop: 0.0
 position_max: 205
@@ -44,7 +47,8 @@ position_max: 205
 step_pin: PB1
 dir_pin: !PB0
 enable_pin: !PD6
-step_distance: 0.010753
+microsteps: 16
+rotation_distance: 34.410
 nozzle_diameter: 0.400
 filament_diameter: 1.750
 max_extrude_only_distance: 500.0