ASoC: mdmcalifornium: Add fix for MI2S startup reference count

Add a fix for an issue where the MI2S start
references is not tracked properly. The
issue is that since both TX and RX MI2S
calls into the startup function the dai format
is called two times which is not needed and
leads to an error. By tracking the number
of entries this can be avoided.

CRs-fixed: 1019776
Change-Id: I73745213cd5675c9be6e418346c3d24b54196bad
Signed-off-by: Josh Kirsch <jkirsch@codeaurora.org>