msm: ipa: Fix to use after free issue

Added code changes to avoid use after free
if header already table already freed
during ipa ioctl test.

Change-Id: I5e89c28448bd3b94714451432774457a170005bd
Acked-by: Ashok Vuyyuru <avuyyuru@qti.qualcomm.com>
Signed-off-by: Mohammed Javid <mjavid@codeaurora.org>