gdbstub/internals.h: clean up include guard

Use something more specific to avoid name clashes.

Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20230302190846.2593720-2-alex.bennee@linaro.org>
Message-Id: <20230303025805.625589-2-richard.henderson@linaro.org>
diff --git a/gdbstub/internals.h b/gdbstub/internals.h
index b23999f..7df0e11 100644
--- a/gdbstub/internals.h
+++ b/gdbstub/internals.h
@@ -6,8 +6,8 @@
  * SPDX-License-Identifier: GPL-2.0-or-later
  */
 
-#ifndef _INTERNALS_H_
-#define _INTERNALS_H_
+#ifndef GDBSTUB_INTERNALS_H
+#define GDBSTUB_INTERNALS_H
 
 #include "exec/cpu-common.h"
 
@@ -16,4 +16,4 @@
 int gdb_breakpoint_remove(CPUState *cs, int type, vaddr addr, vaddr len);
 void gdb_breakpoint_remove_all(CPUState *cs);
 
-#endif /* _INTERNALS_H_ */
+#endif /* GDBSTUB_INTERNALS_H */