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

tmk_core/protocol/lufa/lufa.h

@@ -36,8 +36,7 @@
   this software.
 */
 
-#ifndef _LUFA_H_
-#define _LUFA_H_
+#pragma once
 
 #include <avr/io.h>
 #include <avr/wdt.h>
@@ -68,5 +67,3 @@ extern host_driver_t lufa_driver;
 // The header and terminator are not stored to save a few bytes of precious ram
 #    define MIDI_SYSEX_BUFFER (API_SYSEX_MAX_SIZE + API_SYSEX_MAX_SIZE / 7 + (API_SYSEX_MAX_SIZE % 7 ? 1 : 0))
 #endif
-
-#endif