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

This reverts commit ec7b48076009cfe82e5ee91050f5fc66c4850193.

Reason for revert: <Reland>

I made the commit out of order with the fu740 commit; that's now
merged so there should be no problem.

Signed-off-by: ron minnich <rminnich@gmail.com>

Change-Id: I2fb8c2e0a7fcd5f26f4a004e0949332b108b6fcf
Reviewed-on: https://review.coreboot.org/c/coreboot/+/81052
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin L Roth <gaumless@gmail.com>
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-by: ron minnich <rminnich@gmail.com>

0 files changed, 0 insertions, 0 deletions