GLINK changed their default handling of channel callbacks from the irq context to a callback thread. This change impacted FastRPC performance. Configure FastRPC to use irq context to handle channel callbacks to fix the performance regression. Change-Id: I59b2611e2ebe3f5d33650666a8ad7912d79cc1d1 Signed-off-by: Om Deore <quic_odeore@quicinc.com>