🐛 Fix conditional M81 suicide (#23549)

Marlin/src/core/language.h

 
 #define STR_ENQUEUEING                      "enqueueing \""
 #define STR_POWERUP                         "PowerUp"
+#define STR_POWEROFF                        "PowerOff"
 #define STR_EXTERNAL_RESET                  " External Reset"
 #define STR_BROWNOUT_RESET                  " Brown out Reset"
 #define STR_WATCHDOG_RESET                  " Watchdog Reset"
 #define STR_Z_PROBE_OFFSET                  "Z-Probe Offset"
 #define STR_TEMPERATURE_UNITS               "Temperature Units"
 #define STR_USER_THERMISTORS                "User thermistors"
+#define STR_DELAYED_POWEROFF                "Delayed poweroff"
 
 //
 // Endstop Names used by Endstops::report_states

Marlin/src/feature/power.cpp

  * power.cpp - power control
  */
 
-#include "../inc/MarlinConfig.h"
+#include "../inc/MarlinConfigPre.h"
+
+#if EITHER(PSU_CONTROL, AUTO_POWER_CONTROL)
 
 #include "power.h"
 #include "../module/planner.h"
   #include "../gcode/gcode.h"
 #endif
 
-#if EITHER(PSU_CONTROL, AUTO_POWER_CONTROL)
-
 Power powerManager;
 bool Power::psu_on;
 
  * Processes any PSU_POWEROFF_GCODE and makes a PS_OFF_SOUND if enabled.
  */
 void Power::power_off() {
+  SERIAL_ECHOLNPGM(STR_POWEROFF);
+
+  TERN_(HAS_SUICIDE, suicide());
+
   if (!psu_on) return;
 
   #ifdef PSU_POWEROFF_GCODE

Marlin/src/gcode/control/M80_M81.cpp

     }
   #endif
 
-  if (delayed_power_off) return;
+  if (delayed_power_off) {
+    SERIAL_ECHOLNPGM(STR_DELAYED_POWEROFF);
+    return;
+  }
 
   #if HAS_SUICIDE
     suicide();

Marlin/src/libs/MAX31865.cpp

         enableBias();
         nextEventStamp = millis() + 11; // wait at least 11msec before enabling 1shot
         nextEvent = SETUP_1_SHOT_MODE;
-        DEBUG_ECHOLN("MAX31865 bias voltage enabled");
+        DEBUG_ECHOLNPGM("MAX31865 bias voltage enabled");
         break;
 
       case SETUP_1_SHOT_MODE:
         oneShot();
         nextEventStamp = millis() + 65; // wait at least 65msec before reading RTD register
         nextEvent = READ_RTD_REG;
-        DEBUG_ECHOLN("MAX31865 1 shot mode enabled");
+        DEBUG_ECHOLNPGM("MAX31865 1 shot mode enabled");
         break;
 
       case READ_RTD_REG: {

Marlin/src/pins/stm32f1/pins_MKS_ROBIN_NANO_V2.h

 //
 #if ENABLED(MKS_PWC)
   #if ENABLED(TFT_LVGL_UI)
-    #undef PSU_CONTROL
+    #if ENABLED(PSU_CONTROL)
+      #error "PSU_CONTROL is incompatible with MKS_PWC plus TFT_LVGL_UI."
+    #endif
     #undef MKS_PWC
     #define SUICIDE_PIN                     PB2
     #define SUICIDE_PIN_STATE               LOW

Marlin/src/pins/stm32f1/pins_MKS_ROBIN_NANO_common.h

 //
 #if ENABLED(MKS_PWC)
   #if ENABLED(TFT_LVGL_UI)
-    #undef PSU_CONTROL
+    #if ENABLED(PSU_CONTROL)
+      #error "PSU_CONTROL is incompatible with MKS_PWC plus TFT_LVGL_UI."
+    #endif
     #undef MKS_PWC
     #define SUICIDE_PIN                     PB2
     #define SUICIDE_PIN_STATE               LOW

Marlin/src/pins/stm32f1/pins_MKS_ROBIN_PRO.h

 //
 #if ENABLED(MKS_PWC)
   #if ENABLED(TFT_LVGL_UI)
-    #undef PSU_CONTROL
+    #if ENABLED(PSU_CONTROL)
+      #error "PSU_CONTROL is incompatible with MKS_PWC plus TFT_LVGL_UI."
+    #endif
     #undef MKS_PWC
     #define SUICIDE_PIN                     PG11
     #define SUICIDE_PIN_STATE               LOW

Marlin/src/pins/stm32f4/pins_MKS_ROBIN_NANO_V3_common.h

 //
 #if ENABLED(MKS_PWC)
   #if ENABLED(TFT_LVGL_UI)
-    #undef PSU_CONTROL
+    #if ENABLED(PSU_CONTROL)
+      #error "PSU_CONTROL is incompatible with MKS_PWC plus TFT_LVGL_UI."
+    #endif
     #undef MKS_PWC
     #define SUICIDE_PIN                     PB2
     #define SUICIDE_PIN_STATE               LOW