1. Ping pong buffer configuration is not done during axi
configuration. Rather, they are programmed by enqueuing/
dequeuing of buffers. Ignore ping pong buffer from axi
configuration structure.
2. BUS_CMD register should be updated when all UB offsets/
depths are configured.
Change-Id: I1de1f5a5b43f964cfd3d1d86f91e2e91e58e9939
Signed-off-by: Shuzhen Wang <shuzhenw@codeaurora.org>