Hello Stijn,
I really apologise for the delay, somehow we all missed your email, sorry for that!
We are using Gerrit for code reviews, is it possible for you to push a patch to Gerrit? The guidelines are here: https://www.flashrom.org/Development_Guidelines#Patch_submission
We do very rarely accept patches via mailing list, but as a last resort. If you could push the patch to Gerrit, that would be great! Thank you for your contribution!