dsp: msm_audio_ion_vm: Fix Kernel panic and add token logic in SMMU FE

Fix to resolve kernel panic by unmapping kernel VA when smmu map fails &
add token logic to avoid stale hab response during aHAL restart

Suggested-by: Karthik D K
Signed-off-by: Rahul Sharma <rahsha@codeaurora.org>
Change-Id: I7a793262ffa98d9e6698b99fb720e583d3990ce7