configs/qemu_arm_vexpress_tz_defconfig: bump ATF version, cleanup config

Bump to a later version of ATF and cleanup the Python
configuration. Previously this configuration had to work around Python
3 issues with OP-TEE. Now this relies on OP-TEE properly building
itself with host-python3.

Signed-off-by: Dick Olsson <hi@senzilla.io>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

configs/qemu_arm_vexpress_tz_defconfig

@@ -27,7 +27,7 @@ BR2_LINUX_KERNEL_INTREE_DTS_NAME="vexpress-v2p-ca15_a7"
 # TF-A for booting OP-TEE secure and uboot/linux non secure
 BR2_TARGET_ARM_TRUSTED_FIRMWARE=y
 BR2_TARGET_ARM_TRUSTED_FIRMWARE_CUSTOM_VERSION=y
-BR2_TARGET_ARM_TRUSTED_FIRMWARE_CUSTOM_VERSION_VALUE="v2.0"
+BR2_TARGET_ARM_TRUSTED_FIRMWARE_CUSTOM_VERSION_VALUE="v2.2"
 BR2_TARGET_ARM_TRUSTED_FIRMWARE_PLATFORM="qemu"
 BR2_TARGET_ARM_TRUSTED_FIRMWARE_BL32_OPTEE=y
 BR2_TARGET_ARM_TRUSTED_FIRMWARE_UBOOT_AS_BL33=y
@@ -40,13 +40,6 @@ BR2_PACKAGE_OPTEE_BENCHMARK=y
 BR2_PACKAGE_OPTEE_EXAMPLES=y
 BR2_PACKAGE_OPTEE_TEST=y
 
-# OP-TEE components needs host-python3 interpreter and its modules
-BR2_PACKAGE_HOST_PYTHON3=y
-# Select python3 on the target to make sure Buildroot builds host-python using
-# python3 and builds all host-python modules for python3.
-BR2_TOOLCHAIN_BUILDROOT_WCHAR=y
-BR2_PACKAGE_PYTHON3=y
-
 # U-boot for booting the dear Linux kernel
 BR2_TARGET_UBOOT=y
 BR2_TARGET_UBOOT_BUILD_SYSTEM_KCONFIG=y