sdm: Populate min prefill lines.

Change-Id: I5b3b44413d23d13983e7bb7ecc736893d8ba6aec
diff --git a/libdrmutils/drm_interface.h b/libdrmutils/drm_interface.h
index 6ff192e..01981ca 100644
--- a/libdrmutils/drm_interface.h
+++ b/libdrmutils/drm_interface.h
@@ -401,6 +401,7 @@
   uint32_t max_dest_scaler_input_width = 0;
   uint32_t max_dest_scaler_output_width = 0;
   uint32_t max_dest_scale_up = 1;
+  uint32_t min_prefill_lines = 0;
 };
 
 enum struct DRMPlaneType {