msm: ipa3: fix reading from released memory in ipadma

In ipa_dma_sync_memcopy memory released before checking its value.
changing the order - reading the value and then
releasing the memory.

Change-Id: Id29ecb35134e4c041661c2f7dd5924dbfa5d596d
Signed-off-by: Nadine Toledano <nadinet@codeaurora.org>