dma-mapping: remove the dma_dummy_ops export

dma_dummy_ops is only used by the ACPI code, which can't be modular.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
This commit is contained in:
Christoph Hellwig 2020-09-08 18:34:27 +02:00
commit 3d842b51a0