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/seccomp_64.h b/arch/x86/include/asm/seccomp_64.h
index 03274ce..4171bb7 100644
--- a/arch/x86/include/asm/seccomp_64.h
+++ b/arch/x86/include/asm/seccomp_64.h
@@ -1,5 +1,5 @@
-#ifndef ASM_X86__SECCOMP_64_H
-#define ASM_X86__SECCOMP_64_H
+#ifndef _ASM_X86_SECCOMP_64_H
+#define _ASM_X86_SECCOMP_64_H
 
 #include <linux/thread_info.h>
 
@@ -22,4 +22,4 @@
 #define __NR_seccomp_exit_32 __NR_ia32_exit
 #define __NR_seccomp_sigreturn_32 __NR_ia32_sigreturn
 
-#endif /* ASM_X86__SECCOMP_64_H */
+#endif /* _ASM_X86_SECCOMP_64_H */