Fix PSU_POWERUP_DELAY compile error (#16064)

Marlin/src/inc/Conditionals_post.h

 #endif
 
 /**
- * Power Supply Control
+ * Power Supply
  */
 #ifndef PSU_NAME
-  #if ENABLED(PSU_CONTROL)
-    #if PSU_ACTIVE_HIGH
-      #define PSU_NAME "XBox"     // X-Box 360 (203W)
-    #else
-      #define PSU_NAME "ATX"      // ATX style
-    #endif
-    #if DISABLED(AUTO_POWER_CONTROL)
-      #ifndef PSU_POWERUP_DELAY
-        #define PSU_POWERUP_DELAY 100
-      #endif
-    #elif defined(PSU_POWERUP_DELAY)
-      #error "PSU_POWERUP_DELAY has no effect if AUTO_POWER_CONTROL is enabled."
-    #endif
+  #if DISABLED(PSU_CONTROL)
+    #define PSU_NAME "Generic"  // No control
+  #elif PSU_ACTIVE_HIGH
+    #define PSU_NAME "XBox"     // X-Box 360 (203W)
   #else
-    #define PSU_NAME "Generic"    // No control
+    #define PSU_NAME "ATX"      // ATX style
   #endif
 #endif
 
+#if !defined(PSU_POWERUP_DELAY) && ENABLED(PSU_CONTROL) && DISABLED(AUTO_POWER_CONTROL)
+  #define PSU_POWERUP_DELAY 100
+#endif
+
 /**
  * Temp Sensor defines
  */

Marlin/src/inc/SanityCheck.h

 /**
  * LED Backlight Timeout
  */
-#if defined(LED_BACKLIGHT_TIMEOUT) && !(EITHER(FYSETC_MINI_12864_2_0, FYSETC_MINI_12864_2_1) && ENABLED(PSU_CONTROL))
+#if defined(LED_BACKLIGHT_TIMEOUT) && !(ENABLED(PSU_CONTROL) && EITHER(FYSETC_MINI_12864_2_0, FYSETC_MINI_12864_2_1))
   #error "LED_BACKLIGHT_TIMEOUT requires a FYSETC Mini Panel and a Power Switch."
 #endif
 
     #error "PSU_CONTROL requires PSU_ACTIVE_HIGH to be defined as 'true' or 'false'."
   #elif !PIN_EXISTS(PS_ON)
     #error "PSU_CONTROL requires PS_ON_PIN."
+  #elif defined(PSU_POWERUP_DELAY) && ENABLED(AUTO_POWER_CONTROL)
+    #error "PSU_POWERUP_DELAY has no effect with AUTO_POWER_CONTROL enabled."
   #endif
 #elif ENABLED(AUTO_POWER_CONTROL)
   #error "AUTO_POWER_CONTROL requires PSU_CONTROL."