arm: dma-mapping: handle IOVA address zero
The IOVA allocator used by these calls supports IOVA address zero so properly handle IOVA address zero. Change-Id: Iaaad45b42503f05f95d1333e010f6d8e3bdb1949 Signed-off-by:Liam Mark <lmark@codeaurora.org> Signed-off-by:
Charan Teja Reddy <charante@codeaurora.org>
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