cd ~/android/lineage/kernel/xiaomi/tucana
DTC_EXT=~/android/lineage/prebuilts/tools-lineage/linux-x86/dtc/dtc ARCH=arm64 SUBARCH=arm64 CROSS_COMPILE=${PWD}/toolchain/bin/aarch64-linux-android- make O=../tucana-out REAL_CC=${PWD}/toolchains/llvm-Snapdragon_LLVM_for_Android_8.0/prebuilt/linux-x86_64/bin/clang CLANG_TRIPLE=aarch64-linux-gnu - vendor/tucana_user_defconfig
DTC_EXT=~/android/lineage/prebuilts/tools-lineage/linux-x86/dtc/dtc ARCH=arm64 SUBARCH=arm64 CROSS_COMPILE=${PWD}/toolchain/bin/aarch64-linux-android- make -j8 O=../tucana-out/ REAL_CC=${PWD}/toolchains/llvm-Snapdragon_LLVM_for_Android_8.0/prebuilt/linux-x86_64/bin/clang CLANG_TRIPLE=aarch64-linux-gnu- 2>&1 | tee ../kernel.log
...
After all call mkdtboimg.py create dtbo.img dts/*/*.dtbo
inside of out/arch/arm64/boot/