msm: sps: Avoid pipe disconnect while IRQ is in progress and viceversa

Client driver may disconnect pipe while some data is still
pending on the pipe and might not need IRQ for that data. Current
implementation might result in crash in case disconnect and IRQ happens
on same pipe in parallel. Implement lock to avoid pipe disconnect
while IRQ is in progress for that pipe and viceversa.

Change-Id: Icf43c0a18cfc1644270b684a792632a6c81f1797
Signed-off-by: Rama Krishna Phani A <rphani@codeaurora.org>