ARM: OMAP: Define omap_dm_timer_prepare function as static

The omap_dm_timer_prepare function is a local function only used in the
dmtimer.c file. Therefore, make this a static function and remove its
declaration from the dmtimer.h file.
Signed-off-by: NJon Hunter <jon-hunter@ti.com>

arch/arm/plat-omap/dmtimer.c

@@ -128,7 +128,7 @@ static int omap_dm_timer_reset(struct omap_dm_timer *timer)
 	return 0;
 }
 
-int omap_dm_timer_prepare(struct omap_dm_timer *timer)
+static int omap_dm_timer_prepare(struct omap_dm_timer *timer)
 {
 	int rc;
 

arch/arm/plat-omap/include/plat/dmtimer.h

@@ -286,8 +286,6 @@ struct omap_dm_timer {
 	struct list_head node;
 };
 
-int omap_dm_timer_prepare(struct omap_dm_timer *timer);
-
 static inline u32 __omap_dm_timer_read(struct omap_dm_timer *timer, u32 reg,
 						int posted)
 {