sf: Make sure HWC_BLENDING_NONE is set for opaque layer

Before configuring the layers to HWC, make sure
HWC_BLENDING_NONE is set if the layer is opaque

Change-Id: Ie84aa9d93e98a244692a0cffc2de653a9079f8b4
Crs-fixed: 957373

services/surfaceflinger/Layer.cpp

@@ -467,7 +467,11 @@ void Layer::setGeometry(
 
     // this gives us only the "orientation" component of the transform
     const State& s(getDrawingState());
+#ifdef QTI_BSP
+    if (!isOpaque(s)) {
+#else
     if (!isOpaque(s) || s.alpha != 0xFF) {
+#endif
         layer.setBlending(mPremultipliedAlpha ?
                 HWC_BLENDING_PREMULT :
                 HWC_BLENDING_COVERAGE);