make the functions name consistent

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
diff --git a/clocks.h b/clocks.h
index d66c061..ab3bd36 100644
--- a/clocks.h
+++ b/clocks.h
@@ -13,6 +13,6 @@
  *       - initial API and implementation
  *******************************************************************************/
 
-extern int maxy;
-
 extern int clock_init(void);
+extern int clock_display(void);
+extern int clock_dump(char *clk);