mb/google/poppy: Add variant for nocturne

Add a new variant of poppy for the nocturne board.

Key differences from baseboard include:
- GPIO changes
- devicetree.cb changes
- memory stuffing option changes

TEST=./util/abuild/abuild -p none -t google/poppy -x -a

Change-Id: I11c7829041b3c45407c17f71b08cc7fc17f717e8
Signed-off-by: Nick Vaccaro <nvaccaro@google.com>
Reviewed-on: https://review.coreboot.org/25803
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
10 files changed