Change include guards in tmk_core/ and drivers/ to pragma once (#11240)

tmk_core/common/debug.h

@@ -15,8 +15,7 @@ You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-#ifndef DEBUG_H
-#define DEBUG_H 1
+#pragma once
 
 #include <stdbool.h>
 #include "print.h"
@@ -168,5 +167,3 @@ extern debug_config_t debug_config;
 #    define debug_bin_reverse(data)
 
 #endif /* NO_DEBUG */
-
-#endif