msm: sps: free the interrupt for satellite mode

When BAM is registered in satellite mode on apps side, we do not
need to disable BAM HW when apps side does not use that BAM any
more. But we still should free the interrupt. This is addressed
in this change.

Change-Id: I955ea1a341036efa82f0ecc0f45cad5ec41651ae
Signed-off-by: Yan He <yanhe@codeaurora.org>