iommu/amd: Move unmap_flush message to amd_iommu_init_dma_ops()

The message belongs there anyway, so move it to that
function.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

diff --cc drivers/iommu/amd_iommu.c
Simple merge

diff --cc drivers/iommu/amd_iommu_init.c
Simple merge