display: fix up TTM dependency by setting ov# to 0
am: 088aa2e96c

Change-Id: I79b532e510609f0f5eab2570d36509734efc9369
diff --git a/merrifield/ips/tangier/TngPlaneManager.cpp b/merrifield/ips/tangier/TngPlaneManager.cpp
index d973aa9..08ed8ea 100644
--- a/merrifield/ips/tangier/TngPlaneManager.cpp
+++ b/merrifield/ips/tangier/TngPlaneManager.cpp
@@ -36,7 +36,7 @@
 bool TngPlaneManager::initialize()
 {
     mSpritePlaneCount = 1;  // Sprite D
-    mOverlayPlaneCount = 2;  // Overlay A & C
+    mOverlayPlaneCount = 0;  // Skip overlay A & C by setting count to 0
     mPrimaryPlaneCount = 3;  // Primary A, B, C
     mCursorPlaneCount = 3;