This maybe true for later models but not initial offers.
If you look a the Linux 4.10 change log [1] you will see that while zen supports ECC, it ignores the error correction message. So you can use ECC ram, but you get none of the benefit of ECC ram
That looks like it just adds a class of errors, "deferred", without explanation, though this commit [1] implies that these are for ECC errors whose handling was not urgent, and does not specify further how those would occur (unless the MC knows something about the page being used for cache/re-readable data or something, so it can just drop the page on the floor and reread it).
[1] - https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux....