Apply #pragma once, misc cleanup (#12322)

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

Marlin/src/HAL/HAL_STM32F7/watchdog_STM32F7.h

@@ -19,15 +19,9 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  */
-
-#ifndef WATCHDOG_STM32F7_H
-#define WATCHDOG_STM32F7_H
-
-#include "../../inc/MarlinConfig.h"
+#pragma once
 
 extern IWDG_HandleTypeDef hiwdg;
 
 void watchdog_init();
 void watchdog_reset();
-
-#endif // WATCHDOG_STM32F1_H