x86: Fix ASM_X86__ header guards

Change header guards named "ASM_X86__*" to "_ASM_X86_*" since:

a. the double underscore is ugly and pointless.
b. no leading underscore violates namespace constraints.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
diff --git a/arch/x86/include/asm/suspend_64.h b/arch/x86/include/asm/suspend_64.h
index cf821dd..06284f4 100644
--- a/arch/x86/include/asm/suspend_64.h
+++ b/arch/x86/include/asm/suspend_64.h
@@ -3,8 +3,8 @@
  * Based on code
  * Copyright 2001 Patrick Mochel <mochel@osdl.org>
  */
-#ifndef ASM_X86__SUSPEND_64_H
-#define ASM_X86__SUSPEND_64_H
+#ifndef _ASM_X86_SUSPEND_64_H
+#define _ASM_X86_SUSPEND_64_H
 
 #include <asm/desc.h>
 #include <asm/i387.h>
@@ -49,4 +49,4 @@
 extern char core_restore_code;
 extern char restore_registers;
 
-#endif /* ASM_X86__SUSPEND_64_H */
+#endif /* _ASM_X86_SUSPEND_64_H */