MIPS: Correct the header guard of r4k-timer.h

Rename the header guard of r4k-timer.h from __ASM_R4K_TYPES_H to
__ASM_R4K_TIMER_H what corresponding with the file name.
Signed-off-by: Wei Li <liwei391@huawei.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

arch/mips/include/asm/r4k-timer.h

@@ -5,8 +5,8 @@
  *
  * Copyright (C) 2008 by Ralf Baechle (ralf@linux-mips.org)
  */
-#ifndef __ASM_R4K_TYPES_H
-#define __ASM_R4K_TYPES_H
+#ifndef __ASM_R4K_TIMER_H
+#define __ASM_R4K_TIMER_H
 
 #include <linux/compiler.h>
 
@@ -27,4 +27,4 @@ static inline void synchronise_count_slave(int cpu)
 
 #endif
 
-#endif /* __ASM_R4K_TYPES_H */
+#endif /* __ASM_R4K_TIMER_H */