mb/google/poppy/variants/nautilus: add nautilus board

Create Nautilus board which derives from Poppy, a KBL reference board.

BRANCH=master
BUG=b:66462881
TEST=Build (as initial setup)

Change-Id: I6ca5ab821a7ba1746b37dfd3ea1ed367094d4f52
Signed-off-by: Chris Wang <chriswang@ami.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/21895
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
8 files changed