I have an ls1021a-iot board, part number 700-28203 rev X2 (sch-28203 rev b3). I'm wondering what the latest version of the SDK is that supports it and where do I download it? I've seen references to a version 1.7 SDK, but when I downloaded that, it doesn't appear to support that board just the ls1021a-twr and ls1021a-qds. I've tried the 0.4 SDK and get no output from uboot, which I assume means that I need the release for the version 1 silicon, which seems to be 1.7?