Follow-up the PR #4955, etc

・More ANALOG NUMBERING to Analog Input
・Add comment header to all the section of all the pins files

・Sort sections as follows:
1. Some special definitions (USBCON, LARGE_FLASH, etc)
2. Servos
3. Limit Switches
4. Z Probe
5. Steppers
6. Temperature Sensors
7. Heaters / Fans
8. Misc. Functions
9. LCD / Controller

・Move MAX6675_SS into "Temperature Sensors" section
・Adjust spacing

Marlin/pins_GEN3_PLUS.h

@@ -56,8 +56,6 @@
 #define E0_DIR_PIN         21
 #define E0_ENABLE_PIN      13
 
-#define PS_ON_PIN          14
-
 //
 // Temperature Sensors
 //
@@ -71,6 +69,8 @@
 #define HEATER_BED_PIN     16
 
 //
-// SD Card
+// Misc. Functions
 //
 #define SDSS                4
+#define PS_ON_PIN          14
+