Define AVR_ATmega2560_FAMILY_PLUS_70 in Conditionals

Marlin/src/HAL/HAL_AVR/HAL_pinsDebug_AVR.h

 #ifndef _HAL_PINSDEBUG_AVR_H_
 #define _HAL_PINSDEBUG_AVR_H_
 
+#include "../../inc/MarlinConfig.h"
+
 void HAL_print_analog_pin(char buffer[], int8_t pin) {
   sprintf(buffer, "(A%2d)  ", int(pin - analogInputToDigitalPin(0)));
 }
 
 };
 
-#define AVR_ATmega2560_FAMILY_PLUS_70 (MOTHERBOARD == BOARD_BQ_ZUM_MEGA_3D \
-|| MOTHERBOARD == BOARD_MIGHTYBOARD_REVE \
-|| MOTHERBOARD == BOARD_MINIRAMBO \
-|| MOTHERBOARD == BOARD_SCOOVO_X9H)
-
 #if AVR_AT90USB1286_FAMILY
   // Working with Teensyduino extension so need to re-define some things
   #include "pinsDebug_Teensyduino.h"

Marlin/src/HAL/HAL_AVR/pinsDebug_AVR_8_bit.h

 #ifndef _PINSDEBUG_AVR_8_BIT_
 #define _PINSDEBUG_AVR_8_BIT_
 
-#define AVR_ATmega2560_FAMILY_PLUS_70 (MOTHERBOARD == BOARD_BQ_ZUM_MEGA_3D \
-|| MOTHERBOARD == BOARD_MIGHTYBOARD_REVE \
-|| MOTHERBOARD == BOARD_MINIRAMBO \
-|| MOTHERBOARD == BOARD_SCOOVO_X9H)
+#include "../../inc/MarlinConfig.h"
 
 #if AVR_AT90USB1286_FAMILY
   // Working with Teensyduino extension so need to re-define some things

Marlin/src/inc/Conditionals_post.h

 #ifndef CONDITIONALS_POST_H
 #define CONDITIONALS_POST_H
 
+  #define AVR_ATmega2560_FAMILY_PLUS_70 ( \
+       MB(BQ_ZUM_MEGA_3D)                 \
+    || MB(MIGHTYBOARD_REVE)               \
+    || MB(MINIRAMBO)                      \
+    || MB(SCOOVO_X9H)                     \
+  )
+
   #define IS_SCARA (ENABLED(MORGAN_SCARA) || ENABLED(MAKERARM_SCARA))
   #define IS_KINEMATIC (ENABLED(DELTA) || IS_SCARA)
   #define IS_CARTESIAN !IS_KINEMATIC