sdm: Add property to define max video upscaling limit.

- Add property 'sdm.video_max_upscale' to define max video upscaling
  by SDE. If video upscaling requirement exceeds max_upscale value,
  SDM will use GPU to compose the video.

CRs-Fixed: 1048082
Change-Id: I489dca73e840675ac6cae76f0e81b6369035ec6a
diff --git a/sdm/libs/utils/debug.cpp b/sdm/libs/utils/debug.cpp
index b91cdf4..89b8cd7 100644
--- a/sdm/libs/utils/debug.cpp
+++ b/sdm/libs/utils/debug.cpp
@@ -99,6 +99,13 @@
   return value;
 }
 
+int Debug::GetMaxVideoUpscale() {
+  int value = 0;
+  debug_.debug_handler_->GetProperty("sdm.video_max_upscale", &value);
+
+  return value;
+}
+
 bool Debug::IsVideoModeEnabled() {
   int value = 0;
   debug_.debug_handler_->GetProperty("sdm.video_mode_panel", &value);