mb/google/brox/var/greenbayupoc: Update devicetree and gpio settings

Based on latest schematics GREENBAY_0412.SCH update the gpio and
devicetree settings.

BUG=b:326413034
TEST=emerge-brox coreboot chromeos-bootimage, flash and boot on DUT

Cq-Depend:chrome-internal:7218819
Change-Id: I59f25b8abb7dd8a2dff7ff567b231bddc9db8455
Signed-off-by: Eren Peng <peng.eren@inventec.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/82093
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Derek Huang <derekhuang@google.com>
diff --git a/src/mainboard/google/brox/Kconfig b/src/mainboard/google/brox/Kconfig
index 908612d..00a0509 100644
--- a/src/mainboard/google/brox/Kconfig
+++ b/src/mainboard/google/brox/Kconfig
@@ -70,6 +70,7 @@
 
 config BOARD_GOOGLE_GREENBAYUPOC
 	select BOARD_GOOGLE_BASEBOARD_BROX
+	select CHROMEOS_WIFI_SAR if CHROMEOS
 	select MEMORY_SODIMM
 
 if BOARD_GOOGLE_BROX_COMMON