arm: remove prototype for reset_timer_masked

Remove prototype for function only used in one file

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
diff --git a/arch/arm/cpu/armv7/s5p-common/timer.c b/arch/arm/cpu/armv7/s5p-common/timer.c
index b37892c..0048cd8 100644
--- a/arch/arm/cpu/armv7/s5p-common/timer.c
+++ b/arch/arm/cpu/armv7/s5p-common/timer.c
@@ -19,6 +19,7 @@
 DECLARE_GLOBAL_DATA_PTR;
 
 unsigned long get_current_tick(void);
+static void reset_timer_masked(void);
 
 /* macro to read the 16 bit timer */
 static inline struct s5p_timer *s5p_get_base_timer(void)
@@ -106,7 +107,7 @@
 		;
 }
 
-void reset_timer_masked(void)
+static void reset_timer_masked(void)
 {
 	struct s5p_timer *const timer = s5p_get_base_timer();
 
diff --git a/arch/arm/include/asm/u-boot-arm.h b/arch/arm/include/asm/u-boot-arm.h
index e08435a..f1da115 100644
--- a/arch/arm/include/asm/u-boot-arm.h
+++ b/arch/arm/include/asm/u-boot-arm.h
@@ -39,7 +39,6 @@
 int	board_init(void);
 
 /* cpu/.../interrupt.c */
-void	reset_timer_masked	(void);
 ulong	get_timer_masked	(void);
 void	udelay_masked		(unsigned long usec);