K 10
svn:author
V 6
mhorne
K 8
svn:date
V 27
2020-07-19T23:34:52.314756Z
K 7
svn:log
V 385
riscv: look for bootargs in FDT

The FDT may contain a short /chosen/bootargs string which we should pass
to boot_parse_cmdline. Notably, this allows the use of qemu's -append
option to pass things like -s to boot to single user mode.

Submitted by:	Nathaniel Filardo <nwf20@cl.cam.ac.uk>
Reviewed by:	mhorne
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D25544

END