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/numaq.h b/arch/x86/include/asm/numaq.h
index 124bf7d..1e8bd30 100644
--- a/arch/x86/include/asm/numaq.h
+++ b/arch/x86/include/asm/numaq.h
@@ -23,8 +23,8 @@
  * Send feedback to <gone@us.ibm.com>
  */
 
-#ifndef ASM_X86__NUMAQ_H
-#define ASM_X86__NUMAQ_H
+#ifndef _ASM_X86_NUMAQ_H
+#define _ASM_X86_NUMAQ_H
 
 #ifdef CONFIG_X86_NUMAQ
 
@@ -165,5 +165,5 @@
 	return 0;
 }
 #endif /* CONFIG_X86_NUMAQ */
-#endif /* ASM_X86__NUMAQ_H */
+#endif /* _ASM_X86_NUMAQ_H */