volta will use different wifi SAR from voxel.
Using clamshell mode of fw config to decide to load volta wifi sar.
BUG=b:184820057
TEST=build and verify wifi power as expect.
Cq-Depend: chrome-internal:3824093
Signed-off-by: Sheng-Liang Pan <sheng-liang.pan@quanta.corp-partner.google.com>
Change-Id: I000aefca63346c70556688f232ca54360b3badef
Reviewed-on: https://review.coreboot.org/c/coreboot/+/54051
Reviewed-by: Paul Fagerburg <pfagerburg@chromium.org>
Reviewed-by: YH Lin <yueherngl@google.com>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
834bddfe03