[XL] Change in coreboot[main]: Revert "Revert "mb/sifive: Add Hifive Unmatched mainboard""

[ron minnich (Code Review)]

Attention is currently required from: David Hendricks, Martin L Roth, Maximilian Brune, Philipp Hug, ron minnich.

Hello David Hendricks, Martin L Roth, Maximilian Brune, Philipp Hug, build bot (Jenkins),

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/81052?usp=email

to look at the new patch set (#2).

Change subject: Revert "Revert "mb/sifive: Add Hifive Unmatched mainboard""
......................................................................

Revert "Revert "mb/sifive: Add Hifive Unmatched mainboard""

This reverts commit ec7b48076009cfe82e5ee91050f5fc66c4850193.

Reason for revert: <reland>

Signed-off-by: ron minnich

Change-Id: I2fb8c2e0a7fcd5f26f4a004e0949332b108b6fcf
---
A src/mainboard/sifive/hifive-unmatched/Kconfig
A src/mainboard/sifive/hifive-unmatched/Kconfig.name
A src/mainboard/sifive/hifive-unmatched/Makefile.inc
A src/mainboard/sifive/hifive-unmatched/board_info.txt
A src/mainboard/sifive/hifive-unmatched/cbfs_spi.c
A src/mainboard/sifive/hifive-unmatched/devicetree.cb
A src/mainboard/sifive/hifive-unmatched/fixup_fdt.c
A src/mainboard/sifive/hifive-unmatched/fu740-c000.dtsi
A src/mainboard/sifive/hifive-unmatched/hifive-unmatched-a00-mod.dts
A src/mainboard/sifive/hifive-unmatched/hifive-unmatched-a00.dts
A src/mainboard/sifive/hifive-unmatched/mainboard.c
A src/mainboard/sifive/hifive-unmatched/romstage.c
12 files changed, 1,189 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/52/81052/2