hwc: Do not use BWC when layers are forced split

In the configureSourceSplit() helper (nothing to do with SourceSplit
feature) BWC is being set in all rotator cases.

Remove that since we use that function when layers are forced split,
and we cannot have BWC.

Change-Id: I082005746f1a04766d10381412c399a8946e712d
diff --git a/libhwcomposer/hwc_utils.cpp b/libhwcomposer/hwc_utils.cpp
index ace0017..53aecee 100644
--- a/libhwcomposer/hwc_utils.cpp
+++ b/libhwcomposer/hwc_utils.cpp
@@ -2238,8 +2238,6 @@
         (*rot) = ctx->mRotMgr->getNext();
         if((*rot) == NULL) return -1;
         ctx->mLayerRotMap[dpy]->add(layer, *rot);
-        BwcPM::setBwc(ctx, dpy, hnd, crop, dst, transform, downscale,
-                mdpFlagsL);
         //Configure rotator for pre-rotation
         if(configRotator(*rot, whf, crop, mdpFlagsL, orient, downscale) < 0) {
             ALOGE("%s: configRotator failed!", __FUNCTION__);