msm: ipa: Fix to release the IPA clock

There is a possibility we receive back to back suspend
interrupts and enable IPA clocks twice. if the work is
already scheduled to release the SPS resource then subsequent
work will not be queued and as a result IPA client count
will always be greater than 0. Make a change to not to honor
back to back suspend interrupts.

Change-Id: I5f09cd2a2e4f0b1881940040405dfd258757285e
Acked-by: Chaitanya Pratapa <cpratapa@qti.qualcomm.com>
Signed-off-by: Ravinder Konka <rkonka@codeaurora.org>