add config symbols for arch_{setup,teardown}_dma_ops
From: Christoph Hellwig
Date: Mon Feb 04 2019 - 03:14:34 EST
Hi all,
this series adds kconfig symbols to indicate that the architecture
provides the arch_setup_dma_ops and arch_teardown_dma_ops hooks.
This avoids polluting dma-mapping.h which is included by just about
every driver with implementation details, and also removes some
clutter.