ASoC: msm: Add front ends to support concurrent offload playbacks

For the usecases where stream's post processing is needed in DSP,
the playback is offloaded at its native sample rate and channel
mode to DSP. Currently only one offload playback session is
supported. Add more offload or compressed front ends to support
multiple playback sessions in concurrent.

Change-Id: I29c0410a3fd61a439d2932b77349458212b5ab89
Signed-off-by: Subhash Chandra Bose Naripeddy <snariped@codeaurora.org>