Fix DUAL_X_CARRIAGE not moving at all

Axis would only move when homing.
Bug introduced in 91841d75c9.
Fixes #6956, fixes #7050 and fixes #7291

Marlin/Marlin_main.cpp

     #elif IS_KINEMATIC
       prepare_kinematic_move_to(destination)
     #elif ENABLED(DUAL_X_CARRIAGE)
-      prepare_move_to_destination_dualx()
+      prepare_move_to_destination_dualx() || prepare_move_to_destination_cartesian()
     #else
       prepare_move_to_destination_cartesian()
     #endif