overlay: Request specific pipe type

Request driver for a specific pipe type instead of
notifying the type request using mdp flags.

Change-Id: I83fffc7c0e1f24d903b7dd6d52a58b87c70f3d4f
diff --git a/liboverlay/pipes/overlayGenPipe.cpp b/liboverlay/pipes/overlayGenPipe.cpp
index 303cd34..41cb271 100644
--- a/liboverlay/pipes/overlayGenPipe.cpp
+++ b/liboverlay/pipes/overlayGenPipe.cpp
@@ -68,6 +68,10 @@
         return mCtrl->setVisualParams(metadata);
 }
 
+void GenericPipe::setPipeType(const utils::eMdpPipeType& pType) {
+    mCtrl->setPipeType(pType);
+}
+
 bool GenericPipe::commit() {
     bool ret = false;
     int downscale_factor = utils::ROT_DS_NONE;