Set SYSTEM_TYPE_CONVERTIBLE for Kahlee-based Spin/Flip devices
so SMBIOS reports a convertible enclosure type. This enables
EC_CHROMEEC_USE_VENDOR_TABLET_CONTROLS on non-ChromeOS builds
and allows use of the vendor tablet mode ACPI.
Change-Id: I63d815f4cf46aee064db4a23b97c399aa334aad0
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/91749
Reviewed-by: Martin L Roth <gaumless@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>