msm: rmnet_ipa: do not release resource on pending data

In case there is pending data submitted to IPA, IPA RM resource should
not be released. The resource release happens only when all packets were
processed by IPA.

Change-Id: I9a9ede39785d0e5e75d81c02233182460d0d17a6
Signed-off-by: Mohammed Javid <mjavid@codeaurora.org>