common: Move wait_ticks functions out of common.h

This function belongs in time.h so move it over and add a comment.
Signed-off-by: NSimon Glass <sjg@chromium.org>
Reviewed-by: NTom Rini <trini@konsulko.com>

drivers/timer/mpc83xx_timer.c

@@ -9,6 +9,7 @@
 #include <clk.h>
 #include <dm.h>
 #include <status_led.h>
+#include <time.h>
 #include <timer.h>
 #include <watchdog.h>
 

include/common.h

@@ -286,7 +286,6 @@ int cleanup_before_linux_select(int flags);
 
 /* arch/$(ARCH)/lib/ticks.S */
 uint64_t get_ticks(void);
-void	wait_ticks    (unsigned long);
 
 /* lib/uuid.c */
 #include <uuid.h>

include/time.h

@@ -86,4 +86,14 @@ ulong usec2ticks(unsigned long usec);
  */
 ulong ticks2usec(unsigned long ticks);
 
+/**
+ * wait_ticks() - waits a given number of ticks
+ *
+ * This is an internal function typically used to implement udelay() and
+ * similar. Normally you should use udelay() or mdelay() instead.
+ *
+ * @ticks: Number of ticks to wait
+ */
+void wait_ticks(unsigned long ticks);
+
 #endif /* _TIME_H */