intel/skylake: mainboards: Add MAINBOARD_FAMILY kconfig entry

The family variable was not being set yet for skylake, add this
to the current boards.

BUG=chromium:551715
BRANCH=none
TEST=emerge-glados coreboot

Change-Id: Icf175e4ce89cb47b9eabce1399eb3ef29e7a607f
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 7e379402f38634eb0204e03b616111fff9515cec
Original-Change-Id: Ia31fb04b5c22defc71a0c02d9fa1eff93ccbc49d
Original-Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/311213
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/12390
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
4 files changed