Init stepper current after stepper pins are set up (#13302)

Marlin/src/module/stepper.cpp

 
 void Stepper::init() {
 
-  // Init Digipot Motor Current
-  #if HAS_DIGIPOTSS || HAS_MOTOR_CURRENT_PWM
-    digipot_init();
-  #endif
-
   #if MB(ALLIGATOR)
     const float motor_current[] = MOTOR_CURRENT;
     unsigned int digipot_motor = 0;
     | (INVERT_Z_DIR ? _BV(Z_AXIS) : 0);
 
   set_directions();
-  #if HAS_MOTOR_CURRENT_PWM
-    initialized = true;
+
+  #if HAS_DIGIPOTSS || HAS_MOTOR_CURRENT_PWM
+    #if HAS_MOTOR_CURRENT_PWM
+      initialized = true;
+    #endif
+    digipot_init();
   #endif
 }