MIPS: Idle: Consolidate all declarations in <asm/idle.h>.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/wrppmc/reset.c b/arch/mips/wrppmc/reset.c
index cc5474b..80beb18 100644
--- a/arch/mips/wrppmc/reset.c
+++ b/arch/mips/wrppmc/reset.c
@@ -9,6 +9,7 @@
 #include <linux/kernel.h>
 
 #include <asm/cacheflush.h>
+#include <asm/idle.h>
 #include <asm/mipsregs.h>
 #include <asm/processor.h>