[MIPS] asm headers' updates

Make some asm headers adjusted to the latest Linux kernel.

Signed-off-by: Shinya Kuribayashi <skuribay@ruby.dti.ne.jp>
diff --git a/include/asm-mips/cachectl.h b/include/asm-mips/cachectl.h
index 9cc2b87..f3ce721 100644
--- a/include/asm-mips/cachectl.h
+++ b/include/asm-mips/cachectl.h
@@ -1,10 +1,12 @@
 /*
- * cachectl.h -- defines for MIPS cache control system calls
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
  *
  * Copyright (C) 1994, 1995, 1996 by Ralf Baechle
  */
-#ifndef	__ASM_MIPS_CACHECTL
-#define	__ASM_MIPS_CACHECTL
+#ifndef	_ASM_CACHECTL
+#define	_ASM_CACHECTL
 
 /*
  * Options for cacheflush system call
@@ -21,4 +23,4 @@
 #define CACHEABLE	0	/* make pages cacheable */
 #define UNCACHEABLE	1	/* make pages uncacheable */
 
-#endif	/* __ASM_MIPS_CACHECTL */
+#endif	/* _ASM_CACHECTL */