Add wifi sar for botenflex.
Due to fw-config cannot distinguish between boten and botenflex.
Using sku_id to decide to load botenflex custom wifi sar.
Detail reason for using sku_id in b:182433707.
BUG=b:182433707
TEST=build and test on boten/botenflex
Cq-Depend: chrome-internal:3686313
Change-Id: Id3f2529a7ad56ff306df98f77cda556656da52a5
Signed-off-by: Stanley Wu <stanley1.wu@lcfc.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/51501
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>