disp: msm: remove use of DMA attributes LLC_NWA and Upstream Hint

Remove DMA_ATTR_IOMMU_USE_LLC_NWA and DMA_ATTR_IOMMU_USE_UPSTREAM_HINT
attributes as they are no longer needed since io-coherency is enabled.
Passing this attribute is a no op since buffer is io-coherent and will
be mapped with a write allocate policy contradicting intention
of that attribute.

Change-Id: I882f148d770c795eb005c5391171a6280c083d37
Signed-off-by: Samantha Tran <samtran@codeaurora.org>

msm/msm_smmu.c

@@ -242,9 +242,6 @@ static int msm_smmu_map_dma_buf(struct msm_mmu *mmu, struct sg_table *sgt,
 		return -ENOMEM;
 	}
 
-	if (flags & MSM_BO_KEEPATTRS)
-		attrs |= DMA_ATTR_IOMMU_USE_LLC_NWA;
-
 	/*
 	 * For import buffer type, dma_map_sg_attrs is called during
 	 * dma_buf_map_attachment and is not required to call again