Optimize the display

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
diff --git a/clocks.c b/clocks.c
index 93dd4b3..59db8a7 100644
--- a/clocks.c
+++ b/clocks.c
@@ -295,7 +295,7 @@
 		     "Name", "Flags", "Rate", "Usecount", "Children") < 0)
 		return -1;
 
-	ret = display_header_footer(CLOCK, buf);
+	ret = display_column_name(buf);
 
 	free(buf);