cyclic: Add a simple test

Add a test for cyclic function registration and activation.

Signed-off-by: Stefan Roese <sr@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/test/test-main.c b/test/test-main.c
index 4f1c54b..ae34002 100644
--- a/test/test-main.c
+++ b/test/test-main.c
@@ -6,6 +6,7 @@
 
 #include <common.h>
 #include <console.h>
+#include <cyclic.h>
 #include <dm.h>
 #include <event.h>
 #include <dm/root.h>
@@ -220,6 +221,7 @@
 static int test_pre_run(struct unit_test_state *uts, struct unit_test *test)
 {
 	ut_assertok(event_init());
+	ut_assertok(cyclic_init());
 
 	if (test->flags & UT_TESTF_DM)
 		ut_assertok(dm_test_pre_run(uts));
@@ -265,6 +267,7 @@
 	ut_unsilence_console(uts);
 	if (test->flags & UT_TESTF_DM)
 		ut_assertok(dm_test_post_run(uts));
+	ut_assertok(cyclic_uninit());
 	ut_assertok(event_uninit());
 
 	return 0;