mb/google/nissa: Create a riven variant

Create the riven variant of nissa reference board by copying the
template files to a new directory named for the variant.

The riven variant is a twinlake platform.

BUG=b:337169542
TEST=util/abuild/abuild -p none -t google/brya -x -a
make sure the build includes GOOGLE_RIVEN

Change-Id: I1be2346d87c891cc0e5fbda094e1f6e0dd60df1b
Signed-off-by: David Wu <david_wu@quanta.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/82132
Reviewed-by: Kapil Porwal <kapilporwal@google.com>
Reviewed-by: Eric Lai <ericllai@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

0 files changed, 0 insertions, 0 deletions