drm_hwcomposer: Add support for IN_FENCE_FD property to DrmPlane

Add support for the IN_FENCE_FD property to DrmPlane.

Signed-off-by: Robert Foss <robert.foss@collabora.com>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
diff --git a/drmplane.h b/drmplane.h
index 2e06986..5b73b08 100644
--- a/drmplane.h
+++ b/drmplane.h
@@ -54,6 +54,7 @@
   const DrmProperty &src_h_property() const;
   const DrmProperty &rotation_property() const;
   const DrmProperty &alpha_property() const;
+  const DrmProperty &in_fence_fd_property() const;
 
  private:
   DrmResources *drm_;
@@ -75,6 +76,7 @@
   DrmProperty src_h_property_;
   DrmProperty rotation_property_;
   DrmProperty alpha_property_;
+  DrmProperty in_fence_fd_property_;
 };
 }