Avoids recalculation of DPAA2_IOVA_TO_VADDR, since this is somewhat
costly function on no-IOMMU setups.
Brings about 0.5 Gbps improvement at 19 Gbps speeds on LX2160 with 512b
packets.
Signed-off-by: Roman Kapl <rka@sysgo.com>
Reviewed-by: Hemant Agrawal <hemant.agrawal@nxp.com>