display: Enable copybit on msm8610

This change is the hwc and copybit changes need to enable
composition to go through mdp on msm8610.

Change-Id: If0df3a247c5f4f4310966d14fe8fd839bf84b9d5
diff --git a/libhwcomposer/hwc.cpp b/libhwcomposer/hwc.cpp
index 9bf0c45..be3d21f 100644
--- a/libhwcomposer/hwc.cpp
+++ b/libhwcomposer/hwc.cpp
@@ -144,13 +144,10 @@
             if(fbZOrder >= 0)
                 ctx->mFBUpdate[dpy]->prepare(ctx, list, fbZOrder);
 
-            /* Temporarily commenting out C2D until we support partial
-               copybit composition for mixed mode MDP
-
-            // Use Copybit, when MDP comp fails
-            if((fbZOrder >= 0) && ctx->mCopyBit[dpy])
-                ctx->mCopyBit[dpy]->prepare(ctx, list, dpy);
-            */
+            if (ctx->mMDP.version < qdutils::MDP_V4_0) {
+                if((fbZOrder >= 0) && ctx->mCopyBit[dpy])
+                    ctx->mCopyBit[dpy]->prepare(ctx, list, dpy);
+            }
         }
     }
     return 0;