qcacmn: Handle the duplicate entries in reo exception ring
We have come across scenarios where rxdma is pushing a certain entry more than once to the reo exception ring. In this scenario, when we try to unmap a buffer, it can lead to multiple unmap of the same buffer. Handle this case, by skipping the process of this duplicate entry, if alrady unmapped, and proceed to the next entry. Change-Id: Iae66f27e432f795ba4730911029fa1d63a75cb06 CRs-Fixed: 2739176
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