Fix TMC-related compile issues. (#12971)

- `STEALTHOP_[XYZE]` configuration options now set the default state.

Marlin/src/feature/tmc_util.cpp

     bool stealthchop_was_enabled = st.en_pwm_mode();
 
     st.TCOOLTHRS(0xFFFFF);
-    #if STEALTHCHOP_ENABLED
-      st.en_pwm_mode(false);
-    #endif
+    st.en_pwm_mode(false);
     st.diag1_stall(true);
 
     return stealthchop_was_enabled;
   }
   void tmc_disable_stallguard(TMC2130Stepper &st, const bool restore_stealth) {
     st.TCOOLTHRS(0);
-    #if STEALTHCHOP_ENABLED
-      st.en_pwm_mode(restore_stealth);
-    #endif
+    st.en_pwm_mode(restore_stealth);
     st.diag1_stall(false);
   }
   bool tmc_enable_stallguard(TMC2660Stepper) {

Marlin/src/feature/tmc_util.h

     }
 
     struct {
-      #if STEALTHCHOP_ENABLED
+      #if HAS_STEALTHCHOP
         bool stealthChop_enabled = false;
       #endif
       #if ENABLED(HYBRID_THRESHOLD)
       TMC::rms_current(mA, mult);
     }
 
-    #if STEALTHCHOP_ENABLED
+    #if HAS_STEALTHCHOP
       inline void refresh_stepping_mode() { this->en_pwm_mode(this->stored.stealthChop_enabled); }
       inline bool get_stealthChop_status() { return this->en_pwm_mode(); }
     #endif
       TMC2208Stepper::rms_current(mA, mult);
     }
 
-    #if STEALTHCHOP_ENABLED
+    #if HAS_STEALTHCHOP
       inline void refresh_stepping_mode() { en_spreadCycle(!this->stored.stealthChop_enabled); }
       inline bool get_stealthChop_status() { return !this->en_spreadCycle(); }
     #endif
         #if ENABLED(HYBRID_THRESHOLD)
           this->stored.hybrid_thrs = _tmc_thrs(this->microsteps(), this->TPWMTHRS(), planner.settings.axis_steps_per_mm[spmm_id]);
         #endif
-        #if STEALTHCHOP_ENABLED
-          this->stored.stealthChop_enabled = !this->en_spreadCycle();
-        #endif
       }
 
       inline void refresh_stepper_current() { rms_current(this->val_mA); }

Marlin/src/lcd/menu/menu_tmc.cpp

 
 #endif
 
-#if STEALTHCHOP_ENABLED
+#if HAS_STEALTHCHOP
 
   #define TMC_EDIT_STEP_MODE(ST) MENU_ITEM_EDIT_CALLBACK(bool, MSG_##ST, &stepper##ST.stored.stealthChop_enabled, refresh_stepping_mode_##ST)
 
   #if ENABLED(SENSORLESS_HOMING)
     MENU_ITEM(submenu, MSG_TMC_HOMING_THRS, menu_tmc_homing_thrs);
   #endif
-  #if STEALTHCHOP_ENABLED
+  #if HAS_STEALTHCHOP
     MENU_ITEM(submenu, MSG_TMC_STEPPING_MODE, menu_tmc_step_mode);
   #endif
   END_MENU();