src/sys/dev/altera/msgdma, branch release/12.3.0

src/sys/dev/altera/msgdma, branch release/12.3.0 FreeBSD source tree https://cgit-dev.freebsd.org/src/atom?h=release%2F12.3.0 2018-04-13T13:23:31Z Add driver for Altera modular Scatter-Gather DMA engine (mSGDMA). 2018-04-13T13:23:31Z Ruslan Bukin br@FreeBSD.org 2018-04-13T13:23:31Z urn:sha1:4be5a951f6086289dfb0fcc61dbc8acf5959224c Sponsored by: DARPA, AFRL Differential Revision: https://reviews.freebsd.org/D9619