🩹 Fix Malyan M300 with S-Curve compile

Fixes MarlinFirmware#24548

Author: thinkyhead

Marlin/src/module/stepper.cpp

@@ -1344,7 +1344,7 @@ void Stepper::set_directions() {
     }
 
     FORCE_INLINE int32_t Stepper::_eval_bezier_curve(const uint32_t curr_step) {
-      #if (defined(__arm__) || defined(__thumb__)) && !defined(STM32G0B1xx) // TODO: Test define STM32G0xx versus STM32G0B1xx
+      #if (defined(__arm__) || defined(__thumb__)) && __ARM_ARCH >= 6 && !defined(STM32G0B1xx) // TODO: Test define STM32G0xx versus STM32G0B1xx
 
         // For ARM Cortex M3/M4 CPUs, we have the optimized assembler version, that takes 43 cycles to execute
         uint32_t flo = 0;

Marlin/src/pins/stm32f0/pins_MALYAN_M300.h

@@ -51,10 +51,13 @@
 //
 // Limit Switches
 //
-#define X_MAX_PIN                           PC13
-#define Y_MAX_PIN                           PC14
-#define Z_MAX_PIN                           PC15
-#define Z_MIN_PIN                           PB7
+#define X_STOP_PIN                          PC13
+#define Y_STOP_PIN                          PC14
+#define Z_STOP_PIN                          PC15
+
+#ifndef Z_MIN_PROBE_PIN
+  #define Z_MIN_PROBE_PIN                   PB7
+#endif
 
 //
 // Steppers