[PATCH v3] MIPS: idle: Add prototype for function check_wait

[Pujin Shi]

This commit adds a prototype to fix warning at W=1:

  arch/mips/kernel/idle.c:126:13: error: no previous prototype for 'check_wait' 
[-Werror=missing-prototypes]

Signed-off-by: Pujin Shi <shipuji...@gmail.com>
---
 arch/mips/include/asm/idle.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/mips/include/asm/idle.h b/arch/mips/include/asm/idle.h
index 655a6dbc861a..0992cad9c632 100644
--- a/arch/mips/include/asm/idle.h
+++ b/arch/mips/include/asm/idle.h
@@ -15,6 +15,8 @@ static inline int using_rollback_handler(void)
        return cpu_wait == r4k_wait;
 }
 
+extern void __init check_wait(void);
+
 extern int mips_cpuidle_wait_enter(struct cpuidle_device *dev,
                                   struct cpuidle_driver *drv, int index);
 
-- 
2.18.1