msm: ipa: Fix to release IPA clock during ap suspend

When AP is going to suspend, there is a possibility that
IPA clock is released twice due to sps_release_resource being
called from 2 different contexts. Make a change to protect
sps_release_resource to make sure IPA clock is released
only once.

Change-Id: I2d7d74e48ce80aa18cab2d42191db8d5edb4a076
Acked-by: Chaitanya Pratapa <cpratapa@qti.qualcomm.com>
Signed-off-by: Sridhar Ancha <sancha@codeaurora.org>