sdm: drm: Set FB secure mode for Writeback Connector

Set FB Secure mode property for the Writeback Connector.

CRs-Fixed: 2098043
Change-Id: I8eb4f4f40541583107e0a8897a874ae7aeec4083
diff --git a/libdrmutils/drm_interface.h b/libdrmutils/drm_interface.h
index 4ecfcbf..74cafd9 100644
--- a/libdrmutils/drm_interface.h
+++ b/libdrmutils/drm_interface.h
@@ -273,6 +273,12 @@
    *      DRMRect * - Array of Connector ROIs
    */
   CONNECTOR_SET_ROI,
+  /*
+   * Op: Set FB secure mode for Writeback connector.
+   * Arg: uint32_t - Connector ID
+   *      uint32_t - FB Secure mode
+   */
+  CONNECTOR_SET_FB_SECURE_MODE,
 };
 
 enum struct DRMRotation {