Some cleanups after converting the driver to use dma-iommu ops.
- Remove nobounce option;
- Cleanup and simplify the path in domain mapping.
Signed-off-by: NLu Baolu <baolu.lu@linux.intel.com>
Tested-by: NLogan Gunthorpe <logang@deltatee.com>
Link: https://lore.kernel.org/r/20201124082057.2614359-8-baolu.lu@linux.intel.comSigned-off-by: NWill Deacon <will@kernel.org>