Avoid kernel crash by removing double clfree() on endpoint closing for ugen(4) devices.
Avoid kernel crash by removing double clfree() on endpoint closing for
ugen(4) devices.

From NetBSD PR#37934 spotted by Logan Aden.

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars