Revert "Revert "arm64: dma: Drop cache invalidation from arch_dma_prep_coherent()""
This reverts commit b7d9aae4. With the Qualcomm remoteproc driver now modified to use a carveout memory region in 57f72170 ("remoteproc: qcom_q6v5_mss: Use a carveout to authenticate modem headers"), we can reinstate c44094ee ("arm64: dma: Drop cache invalidation from arch_dma_prep_coherent()") which relaxes the arm64 implementation of arch_dma_prep_coherent() to perform only a data cache clean operation, rather than a clean-and-invalidate. Signed-off-by: Will Deacon <will@kernel.org>
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