hwc: Do not use Borderfill pipe for composition in WFD

Mixer dimensions programmed for WFD and wfd resolution request
received are different due to alignment restriction. So we will
not receive any layer with dimensions same as bottom most layer
in case of WFD. So we can safely avoid these usecases to avoid
usage of borderfill pipe.

Change-Id: I824b8827c2b04c122da6db279bf8152ee9b8a99e
1 file changed