ASoC: msm8974: Add support for HFP

Add support for HFP for 8974 target.
Front end dai for HFP hostless for RX and MM6 for TX for HFP

Change-Id: I0406bd2b10c3daab4d583c690f27a9ba1d09af60
Signed-off-by: Vimal Puthanveed <vimalp@codeaurora.org>
Signed-off-by: flar2 <asegaert@gmail.com>