Fix creation of dma tags and TSO settings

TSO settings were not reflecting real HW capabilities.

DMA tags were created with wrong window - high address was the same as
low, so excluding window was not working.

Capabilities of TX dma transaction were not set properly - TSO max size
had been increased and size of one segment had been adjusted.

Submitted by: Michal Krawczyk <mk@semihalf.com>
Obtained from: Semihalf
Sponsored by: Amazon.com Inc.