[core] Refactor realtek-ambz, cleanup, reformat, add missing copyrights

platform/realtek-ambz/fixups/.clang-format

@@ -0,0 +1,2 @@
+DisableFormat: true
+SortIncludes: Never

platform/realtek-ambz/fixups/WCharacterFixup.h

@@ -1,3 +1,5 @@
+/* Copyright (c) Kuba Szczodrzyński 2022-04-23. */
+
 /* WCharacter.h uses deprecated isascii() and toascii(),
    which are available in gnu++11 but not c++11 */
 #include <cstddef>

platform/realtek-ambz/fixups/cmsis_ipsr.c

@@ -1,3 +1,5 @@
+/* Copyright (c) Kuba Szczodrzyński 2022-04-22. */
+
 #include <stdint.h>
 
 // for some reason, cmsis_os.c does not link properly when this method is inlined in core_cmFunc.h

platform/realtek-ambz/fixups/log_uart.c

@@ -1,5 +1,7 @@
-#include "ameba_soc.h"
-#include "osdep_service.h"
+/* Copyright (c) Kuba Szczodrzyński 2022-04-22. */
+
+#include <ameba_soc.h>
+#include <osdep_service.h>
 
 // usage:
 // extern int LOGUART_SetBaud(uint32_t BaudRate);

platform/realtek-ambz/fixups/wifi_mode.c

@@ -1,3 +1,5 @@
+/* Copyright (c) Kuba Szczodrzyński 2022-04-22. */
+
 #include <wifi_conf.h>
 
 // wifi_mode is declared in atcmd_wifi.c, which is a part of the built-in trash console