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>

arch/x86/include/asm/visws/cobalt.h

@@ -1,5 +1,5 @@
-#ifndef ASM_X86__VISWS__COBALT_H
-#define ASM_X86__VISWS__COBALT_H
+#ifndef _ASM_X86_VISWS__COBALT_H
+#define _ASM_X86_VISWS__COBALT_H
 
 #include <asm/fixmap.h>
 
@@ -122,4 +122,4 @@ extern char visws_board_type;
 
 extern char visws_board_rev;
 
-#endif /* ASM_X86__VISWS__COBALT_H */
+#endif /* _ASM_X86_VISWS__COBALT_H */

arch/x86/include/asm/visws/lithium.h

@@ -1,5 +1,5 @@
-#ifndef ASM_X86__VISWS__LITHIUM_H
-#define ASM_X86__VISWS__LITHIUM_H
+#ifndef _ASM_X86_VISWS__LITHIUM_H
+#define _ASM_X86_VISWS__LITHIUM_H
 
 #include <asm/fixmap.h>
 
@@ -49,5 +49,5 @@ static inline unsigned short li_pcib_read16(unsigned long reg)
 	return *((volatile unsigned short *)(LI_PCIB_VADDR+reg));
 }
 
-#endif /* ASM_X86__VISWS__LITHIUM_H */
+#endif /* _ASM_X86_VISWS__LITHIUM_H */
 

arch/x86/include/asm/visws/piix4.h

@@ -1,5 +1,5 @@
-#ifndef ASM_X86__VISWS__PIIX4_H
-#define ASM_X86__VISWS__PIIX4_H
+#ifndef _ASM_X86_VISWS__PIIX4_H
+#define _ASM_X86_VISWS__PIIX4_H
 
 /*
  * PIIX4 as used on SGI Visual Workstations
@@ -104,4 +104,4 @@
  */
 #define	PIIX_GPI_STPCLK		0x4	// STPCLK signal routed back in
 
-#endif /* ASM_X86__VISWS__PIIX4_H */
+#endif /* _ASM_X86_VISWS__PIIX4_H */