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Convert atse(4) driver for Altera Triple-Speed Ethernet MegaCore to use

Description

Convert atse(4) driver for Altera Triple-Speed Ethernet MegaCore to use
xdma(4) interface.

This allows us to switch between Altera mSGDMA or SoftDMA engines used by
atse(4) device.

This also makes atse(4) driver become 25% smaller.

Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D9618

Details

Provenance
brAuthored on
Differential Revision
D9618: xDMA support for atse(4)
Parents
rS332473: Add beripic1, msgdma and softdma instances.
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