soc: qcom: smem: Fix memory leak

In case of Hibernation we are calling probe twice
once in thaw and in restore but we are not freeing
the allocation in freeze callback, causing
possible memory leak.
Fix by freeing allocations.

Change-Id: If0be8de534e21ac6349279ba0f53dd9b2f3e30d1
Signed-off-by: Arun Prakash <app@codeaurora.org>
Signed-off-by: Atul Raut <araut@codeaurora.org>