sdm: Get supported value for base layer staging

Change-Id: I8f1f6c8f4b2b4b20a227b616861c43df0185e523
CRs-Fixed: 2494858
diff --git a/libdrmutils/drm_interface.h b/libdrmutils/drm_interface.h
index c22ed6f..316dbe4 100644
--- a/libdrmutils/drm_interface.h
+++ b/libdrmutils/drm_interface.h
@@ -510,6 +510,7 @@
   bool concurrent_writeback = false;
   uint32_t num_mnocports;
   uint32_t mnoc_bus_width;
+  bool use_baselayer_for_stage = false;
 };
 
 enum struct DRMPlaneType {