MMFMWK-7852 v4l2 error log

- When set fmt field to V4L2_FIELD_ANY
  It will print error log, as it is not a critical issue
  Change it to GST_WARNING

Signed-off-by: Lyon Wang <lyon.wang@nxp.com>
diff --git a/sys/v4l2/gstv4l2object.c b/sys/v4l2/gstv4l2object.c
index d09ec6a..c074196 100755
--- a/sys/v4l2/gstv4l2object.c
+++ b/sys/v4l2/gstv4l2object.c
@@ -1983,7 +1983,7 @@
    * gst_v4l2_object_add_interlace_mode */
   switch (field) {
     case V4L2_FIELD_ANY:
-      GST_ERROR
+      GST_WARNING
           ("Driver bug detected - check driver with v4l2-compliance from http://git.linuxtv.org/v4l-utils.git\n");
       /* fallthrough */
     case V4L2_FIELD_NONE: