Fix for reading microstepping resolution

Marlin/stepper.cpp

 {
       SERIAL_PROTOCOLPGM("MS1,MS2 Pins\n");
       SERIAL_PROTOCOLPGM("X: ");
-      SERIAL_PROTOCOL(   digitalRead(X_MS1_PIN));
-      SERIAL_PROTOCOLLN( digitalRead(X_MS2_PIN));
+      SERIAL_PROTOCOL(   READ(X_MS1_PIN));
+      SERIAL_PROTOCOLLN( READ(X_MS2_PIN));
       SERIAL_PROTOCOLPGM("Y: ");
-      SERIAL_PROTOCOL(   digitalRead(Y_MS1_PIN));
-      SERIAL_PROTOCOLLN( digitalRead(Y_MS2_PIN));
+      SERIAL_PROTOCOL(   READ(Y_MS1_PIN));
+      SERIAL_PROTOCOLLN( READ(Y_MS2_PIN));
       SERIAL_PROTOCOLPGM("Z: ");
-      SERIAL_PROTOCOL(   digitalRead(Z_MS1_PIN));
-      SERIAL_PROTOCOLLN( digitalRead(Z_MS2_PIN));
+      SERIAL_PROTOCOL(   READ(Z_MS1_PIN));
+      SERIAL_PROTOCOLLN( READ(Z_MS2_PIN));
       SERIAL_PROTOCOLPGM("E0: ");
-      SERIAL_PROTOCOL(   digitalRead(E0_MS1_PIN));
-      SERIAL_PROTOCOLLN( digitalRead(E0_MS2_PIN));
+      SERIAL_PROTOCOL(   READ(E0_MS1_PIN));
+      SERIAL_PROTOCOLLN( READ(E0_MS2_PIN));
       #if defined(E1_MS1_PIN) && E1_MS1_PIN > -1
       SERIAL_PROTOCOLPGM("E1: ");
-      SERIAL_PROTOCOL(   digitalRead(E1_MS1_PIN));
-      SERIAL_PROTOCOLLN( digitalRead(E1_MS2_PIN));
+      SERIAL_PROTOCOL(   READ(E1_MS1_PIN));
+      SERIAL_PROTOCOLLN( READ(E1_MS2_PIN));
       #endif
 }