DMA-API: others: use dma_set_coherent_mask()

The correct way for a driver to specify the coherent DMA mask is
not to directly access the field in the struct device, but to use
dma_set_coherent_mask().  Only arch and bus code should access this
member directly.

Convert all direct write accesses to using the correct API.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --cc drivers/ata/pata_ixp4xx_cf.c
Simple merge

diff --cc drivers/gpu/drm/exynos/exynos_drm_drv.c
Simple merge

diff --cc drivers/gpu/drm/omapdrm/omap_dmm_tiler.c
Simple merge