hwc: Reset state of layer which needs rotation

  This change was removed during re base
  ( original commit id: I266a87228193fd85252a22242b66dd4af5f3033f).

  Bringing it back.

Change-Id: I625add1996ca98c47cedecbe8c9f27d298c5f079
diff --git a/libhwcomposer/hwc.cpp b/libhwcomposer/hwc.cpp
index 6dd77b1..750821c 100644
--- a/libhwcomposer/hwc.cpp
+++ b/libhwcomposer/hwc.cpp
@@ -106,6 +106,8 @@
             ctx->mFBUpdate[i]->reset();
         if(ctx->mCopyBit[i])
             ctx->mCopyBit[i]->reset();
+        if(ctx->mLayerRotMap[i])
+            ctx->mLayerRotMap[i]->reset();
     }
 }