fix compile bug

components/iflytop_can_slave_module_master_end/stepmotor.cpp

@@ -1,4 +1,6 @@
 #include "stepmotor.hpp"
+#ifdef HAL_CAN_MODULE_ENABLED
+
 using namespace iflytop;
 
 #define SAMC_REG_ACT_ROTATE          (0)  // ËÙ¶Èģʽ¿ØÖÆ
@@ -138,3 +140,4 @@ void StepMotor::clearException() {
 namespace iflytop {
 StepMotor g_nullStepMotor;
 }
+#endif