ci(fvp): bump OP-TEE to 4.7.0

New binaries pushed to downloads area. Compile commands w/out Firmware
Handoff support:

``` sh
make -j O=out/arm \
    CFG_USER_TA_TARGETS=ta_arm64 CFG_ARM64_core=y PLATFORM=vexpress-fvp \
    CROSS_COMPILE=aarch64-linux-gnu- \
    CROSS_COMPILE_core=aarch64-linux-gnu- \
    CROSS_COMPILE_ta_arm64=aarch64-linux-gnu- \
    CROSS_COMPILE_ta_arm32=arm-none-linux-gnueabihf- \
    CFG_TEE_CORE_LOG_LEVEL=3 DEBUG=0 \
    CFG_IN_TREE_EARLY_TAS="trusted_keys/f04a0fe7-1f5d-4b9b-abf7-619b85b4ce8c" \
    CFG_ARM_GICV3=y
```

With firmware handoff support:

``` sh
make -j O=out/arm \
    CFG_USER_TA_TARGETS=ta_arm64 CFG_ARM64_core=y PLATFORM=vexpress-fvp \
    CROSS_COMPILE=aarch64-linux-gnu- \
    CROSS_COMPILE_core=aarch64-linux-gnu- \
    CROSS_COMPILE_ta_arm64=aarch64-linux-gnu- \
    CROSS_COMPILE_ta_arm32=arm-none-linux-gnueabihf- \
    CFG_TEE_CORE_LOG_LEVEL=3 DEBUG=0 \
    CFG_IN_TREE_EARLY_TAS="trusted_keys/f04a0fe7-1f5d-4b9b-abf7-619b85b4ce8c" \
    CFG_ARM_GICV3=y CFG_TRANSFER_LIST=y
```

Signed-off-by: Harrison Mutai <harrison.mutai@arm.com>
Change-Id: Id98bba8df9cbf90b5ce1c327485274a129bde095
diff --git a/fvp_utils.sh b/fvp_utils.sh
index d082cd2..c65f5e9 100644
--- a/fvp_utils.sh
+++ b/fvp_utils.sh
@@ -38,12 +38,12 @@
 uefi_ci_bin_url="${uefi_ci_bin_url:-$uefi_downloads/Artifacts/Linux/github/fvp/static/DEBUG_GCC5/FVP_AARCH64_EFI.fd}"
 
 uboot32_fip_url="$linaro_release/fvp32-latest-busybox-uboot/fip.bin"
+optee_version="4.7.0"
+
 if [[ "$test_config" == *handoff* ]]; then
-	optee_path=$tfa_downloads/optee/handoff/4.6.0
+	optee_path=$tfa_downloads/optee/${optee_version}/handoff
 	uboot_url="${tfa_downloads}/handoff/fvp/u-boot.bin"
 else
-	optee_version="4.5.0"
-
 	optee_path=$tfa_downloads/optee/${optee_version}
 	uboot_url="${tfa_downloads}/linux_boot/fvp/u-boot.bin"
 fi