drivers/dma: dw-axi-dmac-starfive: Remove calls specific to ARM64 ACPI

[geertu]

iort_dma_setup() is being removed by commit db59e1b ("ACPI:
arm64: Move DMA setup operations out of IORT") in iommu/next:

drivers/dma/dw-axi-dmac-starfive/starfive_dmaengine_memcpy.c: In function ‘dw_dma_async_
do_memcpy’:
drivers/dma/dw-axi-dmac-starfive/starfive_dmaengine_memcpy.c:152:2: error: implicit decl
aration of function ‘iort_dma_setup’ [-Werror=implicit-function-declaration]
  152 |  iort_dma_setup(dma_dev, &dma_addr, &dma_size);
  |  ^~~~~~~~~~~~~~
drivers/dma/dw-axi-dmac-starfive/starfive_dmaengine_memcpy.c:153:8: warning: assignment to ‘const struct iommu_ops *’ from ‘int’ makes pointer from integer without a cast [-Wint-conversion]
  153 |  iommu = iort_iommu_configure_id(dma_dev, NULL);
  |        ^
drivers/dma/dw-axi-dmac-starfive/starfive_dmaengine_memcpy.c: In function ‘dw_dma_memcpy_raw’:
drivers/dma/dw-axi-dmac-starfive/starfive_dmaengine_memcpy.c:223:8: warning: assignment to ‘const struct iommu_ops *’ from ‘int’ makes pointer from integer without a cast [-Wint-conversion]
  223 |  iommu = iort_iommu_configure_id(dma_dev, NULL);
  |        ^

iort_dma_setup() and iort_iommu_configure_id() are part of the ARM64
ACPI implementation. As CONFIG_ACPI_IORT cannot be enabled on RISC-V,
they were dummies anyway, so these calls can just be removed.

Signed-off-by: Geert Uytterhoeven geert@linux-m68k.org

Boot-tested, but the affected code paths were not exercised.

[esmil]

Hmm.. using git grep I can't seem to find anywhere either dw_dma_memcpy, dw_dma_memcpy_raw or dw_dma_async_do_memcpy is used, so I can't see any way to actually test the code..

I guess I'll just add it for now and postpone the decision to get rid of it if it really is unused..