Apply #pragma once, misc cleanup (#12322)

* Apply #pragma once in headers
* Adjust some thermistors formatting
* Misc cleanup and formatting

Marlin/src/HAL/HAL_STM32F4/HAL_Servo_STM32F4.h

@@ -20,22 +20,18 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  */
-
-#ifndef HAL_SERVO_STM32F4_H
-#define HAL_SERVO_STM32F4_H
+#pragma once
 
 #include <Servo.h>
 
 // Inherit and expand on the official library
 class libServo : public Servo {
-public:
+  public:
     int8_t attach(const int pin);
     int8_t attach(const int pin, const int min, const int max);
     void move(const int value);
-private:
+  private:
     uint16_t min_ticks;
     uint16_t max_ticks;
     uint8_t servoIndex;               // index into the channel data for this servo
 };
-
-#endif // HAL_SERVO_STM32F4_H