msm: ipa: lock BH during WWAN0_PROD resource release

This change is needed to prevent deadlock due to watchdog handler
running while the TX queue is already locked by the suspend handler.

Change-Id: I8f8afc50719e352972489bd9c7819600a7e2fead
Signed-off-by: Ravi Gummadidala <rgummadi@codeaurora.org>