[PATCH] dts: ConfigurationError not thrown due to lack of next default value

[Luca Vizzarro]

Hi Riley,

Thank you for this fix! Looks good to me, this is obviously a bug. It 
needs the Fixes tag referencing the original commit, so that it can be 
retrospectively fixed on the LTS versions. The CI would complain about 
this if the commit subject would be correctly phrased to something like:

   dts: fix port info getter when port is not found

Luca