msm: ais: ife SOF and buffer done tracking

Add caching of HW SOF timestamps to correlate with frame done events to
ensure reported information for frame is accurate.
To ensure HW FIFO is fully utilized use HW FIFO status instead of SW
variable and enq buffers to HW on SOF or frame done interrupts.

Change-Id: I5e6eee4142ca4294afe172cede5724eb2ecb243e
Signed-off-by: Terence Ho <terenceh@codeaurora.org>