I tried every port, as listed above. So I knew, which ones were not used.
I just added these ports, that were not used, to the boot section using uia_exclude:
uia_exclude=HS01;HS02;HS07;HS08;HS11;HS12;SS01;SS02
I actually did 2 steps. First I just added the HS ports, since the SS ones weren't...