mb/google/octopus: Create bobba variant

This creates a bobba variant for octopus.
The devicetree overrides are copied from fleex, otherwise everything
just defaults to baseboard settings.

BUG=b:110781720
TEST=None

Change-Id: Ic30c6b0d955ce26f4a9f40cd7fef1c429ab950fc
Signed-off-by: Justin TerAvest <teravest@chromium.org>
Reviewed-on: https://review.coreboot.org/27223
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
6 files changed