For me the kext did not work as is, having still the sleep / wake issues - however I used the AMD9xxxControllerPatcher.kext and edited the Info.plist to change CFG_FB_LIMIT from 0 to 5 (the number of my card's ports) - and now the sleep/wake issue is resolved. Combined with RadeonDeInit and I'm back on track.
The other option is to use WhateverGreen and a patch to change the value - but that's a bit more involved. Hopefully Clover will incorporate the patch by default at some point. Attached the modified kext if someone needs it and is too lazy to change the value
nice what gpu are you using?