msmL ipa3: Fix to avoid NULL pointer access after freeing it

Observing SMMU fault because of providing the already free pointer to
IPA HW. Add changes to avoid the accessing the already freed pointer.

Change-Id: I4d7420816aec0ab7207c683315558e551373d8bc
Signed-off-by: Ashok Vuyyuru <avuyyuru@codeaurora.org>