This change adds a sku_id() function that returns a static value to
differentiate the sarien and arcada boards.
Change-Id: I1fecc675573a6aece7188aae9370733068d45dbf
Signed-off-by: Duncan Laurie <dlaurie@google.com>
Reviewed-on: https://review.coreboot.org/29486
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>