event: Fix a wrong type_name from dm_post_init to dm_post_init_f

DM_POST_INIT was changed to DM_POST_INIT_F.
To debug correct message, change type_name from dm_post_init to
dm_post_init_f.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
s/an/a/ :
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/common/event.c b/common/event.c
index 20720c5..3224e28 100644
--- a/common/event.c
+++ b/common/event.c
@@ -27,7 +27,7 @@
 	"test",
 
 	/* Events related to driver model */
-	"dm_post_init",
+	"dm_post_init_f",
 	"dm_pre_probe",
 	"dm_post_probe",
 	"dm_pre_remove",