qcacmn: Ignore qdf debug fs create failure during init/deinit

Debug fs create failure should not fail wifi turn on. Add logic
to allow wifi turn on even if kernel debug fs create API returns
failure.

Change-Id: I686362340d9ef0268ca7587ad30c726c33f1c427
CRs-Fixed: 2203330

qdf/linux/src/qdf_debugfs.c

@@ -48,6 +48,9 @@ qdf_export_symbol(qdf_debugfs_init);
 
 QDF_STATUS qdf_debugfs_exit(void)
 {
+	if (!qdf_debugfs_root)
+		return QDF_STATUS_SUCCESS;
+
 	debugfs_remove_recursive(qdf_debugfs_root);
 	qdf_debugfs_root = NULL;