dal: reduce severity of logs

Change-Id: I6a6eb7cac03189d9ad783d83e353492ee8f99d63
CRs-Fixed: 3377045
diff --git a/sdm/libs/dal/hw_device_drm.cpp b/sdm/libs/dal/hw_device_drm.cpp
index 8164111..90326c1 100644
--- a/sdm/libs/dal/hw_device_drm.cpp
+++ b/sdm/libs/dal/hw_device_drm.cpp
@@ -63,6 +63,12 @@
  *  IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
+/* Changes from Qualcomm Innovation Center are provided under the following license:
+ *
+ * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved.
+ * SPDX-License-Identifier: BSD-3-Clause-Clear
+ */
+
 #define __STDC_FORMAT_MACROS
 
 #include <ctype.h>
@@ -2992,7 +2998,7 @@
 DisplayError HWDeviceDRM::SetupConcurrentWritebackModes() {
   // To setup Concurrent Writeback topology, get the Connector ID of Virtual display
   if (drm_mgr_intf_->RegisterDisplay(DRMDisplayType::VIRTUAL, &cwb_config_.token)) {
-    DLOGE("RegisterDisplay failed for Concurrent Writeback");
+    DLOGW("RegisterDisplay failed for Concurrent Writeback");
     return kErrorResources;
   }