msm: ipa: Fix use after free issue

Added code changes to avoid use after free
by having local copy and
cache it upon successful return.

Change-Id: Iffac9ba89658b986bd8b630d22af619300e0ff5d
Acked-by: Pooja Kumari <kumarip@qti.qualcomm.com>
Signed-off-by: Mohammed Javid <mjavid@codeaurora.org>