The generic swiotlb_alloc and swiotlb_free routines already take care
of CMA allocations and adding GFP_DMA32 where needed, so use them
instead of the arm specific helpers.
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Acked-by: NChristian König <christian.koenig@amd.com>
Reviewed-by: NRobin Murphy <robin.murphy@arm.com>