Merge branch 'dpaa2-swtso-fixes'

Ioana Ciornei says:

====================
dpaa2-eth: software TSO fixes

This patch fixes the software TSO feature in dpaa2-eth.

There are multiple errors that I made in the initial submission of the
code, which I didn't caught since I was always running with passthough
IOMMU.

The bug report came in bugzilla:
https://bugzilla.kernel.org/show_bug.cgi?id=215886



The bugs are in the Tx confirmation path, where I was trying to retrieve
a virtual address after DMA unmapping the area. Besides that, another
dma_unmap call was made with the wrong size.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>