avf: wrong argument passed to avf_log_err

Type: fix

Signed-off-by: Steven Luong <sluong@cisco.com>
Change-Id: Ica4601c9d17e182cbc348989a9f75ab1cb18b78a
diff --git a/src/plugins/avf/device.c b/src/plugins/avf/device.c
index 2b4801e..0481e61 100644
--- a/src/plugins/avf/device.c
+++ b/src/plugins/avf/device.c
@@ -1241,7 +1241,7 @@
 
 	      if ((err = avf_config_promisc_mode (vm, ad, is_enable)))
 		{
-		  avf_log_err (ad, "%s: %U", format_clib_error, err);
+		  avf_log_err (ad, "error: %U", format_clib_error, err);
 		  clib_error_free (err);
 		}
 	    }