Only match devices with a valid configuration.

Most of the WiFi/Ethernet USB adapter only have one configuration and always
use its first interface. In order to improve USB descriptors parsing star

Only match devices with a valid configuration.

Most of the WiFi/Ethernet USB adapter only have one configuration and always
use its first interface. In order to improve USB descriptors parsing start
by reducing the number of places where a configuration is set.

Tests & ok stsp@

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Move from arpcom to ieee80211com in wi softc. This will be
required for net80211 support.
Updated version of a diff from dlg@
similiar diff ok fgsch@, ok dlg@

Driver for PRISM 2.5/3 based (wifi) USB adapters. This is a work in progress,
it does not yet handle bulk data copies or hostap mode. Only one model
currently supported, however driver may support ot

Driver for PRISM 2.5/3 based (wifi) USB adapters. This is a work in progress,
it does not yet handle bulk data copies or hostap mode. Only one model
currently supported, however driver may support other PRISM based adapters.
ok millert@ fgsch@

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