config: Update example configs to use rotation_distance

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

config/printer-alfawise-u30-2018.cfg

@@ -16,7 +16,8 @@
 step_pin: PB4
 dir_pin: !PB3
 enable_pin: !PB5
-step_distance: .0125
+microsteps: 16
+rotation_distance: 40
 endstop_pin: !PC1
 position_endstop: 0
 position_max: 230
@@ -26,7 +27,8 @@ homing_speed: 50
 step_pin: PB7
 dir_pin: PB6
 enable_pin: !PB8
-step_distance: .0125
+microsteps: 16
+rotation_distance: 40
 endstop_pin: !PC15
 position_endstop: 0
 position_max: 222
@@ -36,7 +38,8 @@ homing_speed: 50
 step_pin: PE0
 dir_pin: !PB9
 enable_pin: !PE1
-step_distance: .0025
+microsteps: 16
+rotation_distance: 8
 endstop_pin: !PE6
 position_endstop: 0.0
 position_max: 250
@@ -45,7 +48,8 @@ position_max: 250
 step_pin: PE3
 dir_pin: PE2
 enable_pin: !PE4
-step_distance: 0.010526
+microsteps: 16
+rotation_distance: 33.683
 nozzle_diameter: 0.400
 filament_diameter: 1.750
 heater_pin: PD3