msm: sps: check the BAM clock status before access a BAM

BAM could be clock gated when apps side is active. Thus, callback
the BAM client to confirm clocks are on before access the BAM. Also
provide the option for client driver to process the BAM IRQ after
the clocks are turned on.

Change-Id: I71682296e4dde3963b338eb65791ff8013495021
Signed-off-by: Yan He <yanhe@codeaurora.org>