Did you already confirm that tegra186-quill-p3310-1000-c03-00-base.dts was the correct dtb by checking dmesg?
For example:
ubuntu@tegra-ubuntu:~$ dmesg | grep .dts
[ 0.000000] DTS File Name: arch/arm64/boot/dts/tegra210-jetson-tx1-p2597-2180-a01-devkit.dts
Looks like all my links broke when they changed forum formats, but here’s my original guide that goes more in depth (for the TX1)