falco: Initial mainboard commit

- Only the first two DIMM SPDs are specified so far
- GPIO map is updated
- iSSD power sequencing removed
- USB port map updated

Change-Id: I4172460d3b075bfd5bb22013a6225cf0e8f95b9c
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/56329
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/4184
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
27 files changed