perf tools: Remove sys/ioctl.h from util.h

Not needed in this header, added to the places that need 'struct
winsize' and the ioctl defines.

Link: http://lkml.kernel.org/n/tip-2pznlli3146y4242otlcm70m@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 4f7e42e..01e779b 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -2,6 +2,7 @@
 #include <linux/err.h>
 #include <dirent.h>
 #include <errno.h>
+#include <sys/ioctl.h>
 #include <sys/param.h>
 #include "term.h"
 #include "../perf.h"