FC 2.0: No external pull up resistor needed for switch on poti pin

The old Arduino nano as used in FC 1.x doesn't have pull up
resistors on A6/A7, on the FC 2.0 the input is A4
(and it seems to work just fine).

Author: thomasjfox

Arduino_Pedelec_Controller/config.h

@@ -83,7 +83,9 @@ const switch_name MENU_BUTTON_DOWN = SWITCH_DISPLAY1;
 const sw_action SW_THROTTLE_SHORT_PRESS = ACTION_SET_SOFT_POTI;
 const sw_action SW_THROTTLE_LONG_PRESS  = ACTION_SHUTDOWN_SYSTEM;
 
-// #define SUPPORT_SWITCH_ON_POTI_PIN              //uncomment if you have an additional switch on the poti pin. use external 10k pullup resistor or it will not work!
+// #define SUPPORT_SWITCH_ON_POTI_PIN              //uncomment if you have an additional switch on the poti pin.
+                                                   //FC 1.x: Use external 10k pullup resistor or it will not work!
+
 const sw_action SW_POTI_SHORT_PRESS = ACTION_NONE;
 const sw_action SW_POTI_LONG_PRESS = ACTION_NONE;