Apply #pragma once, misc cleanup (#12322)

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

Marlin/src/HAL/HAL_STM32F7/HAL_Servo_STM32F7.h

@@ -20,9 +20,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  */
-
-#ifndef HAL_SERVO_STM32F7_H
-#define HAL_SERVO_STM32F7_H
+#pragma once
 
 #include <../../libraries/Servo/src/Servo.h>
 
@@ -37,5 +35,3 @@ private:
     uint16_t max_ticks;
     uint8_t servoIndex;               // index into the channel data for this servo
 };
-
-#endif // HAL_SERVO_STM32F7_H