mb/google/nissa/var/yaviks: Enable USE_MTCL and DRIVERS_MTK_WIFI

This patch selects the DRIVERS_MTK_WIFI and USE_MTCL configs for google/yaviks as
the first platform that provides a country list to the Linux kernel via an
ACPI function (MTCL) in SSDT for MediaTek WiFi chipsets that are capable of
operating on the 6GHz band.

BUG=b:295544553
TEST=Build on similar model (PUJJO) that I have access to and verify the
flag and feature work as intended.
TEST=Add wifi_mtcls.bin blob to cbfs
TEST=Build coreboot for pujjo `emerge-nissa coreboot chromeos-bootimage`
TEST=Verify that MTCL defined in the file is present:
TEST=`acpidump -b`
TEST=`iasl ssdt.dat`
TEST=`less ssdt.dsl`
TEST=Search for MTCL

Change-Id: Iec54fc582d68b443665fceda47187c28f1a9216c
Signed-off-by: David Ruth <druth@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/80305
Reviewed-by: Eric Lai <ericllai@google.com>
Reviewed-by: Kapil Porwal <kapilporwal@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Subrata Banik <subratabanik@google.com>

src/mainboard/google/brya/Kconfig

@@ -485,9 +485,11 @@ config BOARD_GOOGLE_YAVIKS
 	select DRIVERS_GENESYSLOGIC_GL9750
 	select DRIVERS_GENERIC_GPIO_KEYS
 	select DRIVERS_INTEL_MIPI_CAMERA
+	select DRIVERS_MTK_WIFI
 	select EC_GOOGLE_CHROMEEC_INCLUDE_SSFC_IN_FW_CONFIG
 	select HAVE_WWAN_POWER_SEQUENCE
 	select INTEL_GMA_HAVE_VBT
+	select USE_MTCL
 
 config BOARD_GOOGLE_YAVILLA
 	select BOARD_GOOGLE_BASEBOARD_NISSA