preliminary usb support for fwget

[jsm]

Summary

Mostly a copy of pci subsystem support, by replacing pciconf with usbconfig and excluding hardware classes.

Test Plan

fwget usb (with a matched device attached)

[jsm]

sed correct use of quantifier and use * instead of +

[bz]

I was pondering this for a while -- also for other devices -- but I highly felt that usbconfig wanted some improvements first to make this a lot easier.
There are tricky bits with USB devices changing "identity" depending on quirks or other state (i.e., first show up as CD-ROM and then become a network device).

But I am all for a good start :) I'll go and look through to see if I can add a few other bits using your logic next week, if that's ok?

usr.sbin/fwget/usb/usb

59

looks like an indent problem here in Phabricator?

usr.sbin/fwget/usb/usb_ralink

5

I do not think there's anything from the Foundation or me in this file.

[jsm]

Perfectly fine

In D48678#1110205, @bz wrote:

I was pondering this for a while -- also for other devices -- but I highly felt that usbconfig wanted some improvements first to make this a lot easier.
There are tricky bits with USB devices changing "identity" depending on quirks or other state (i.e., first show up as CD-ROM and then become a network device).

But I am all for a good start :) I'll go and look through to see if I can add a few other bits using your logic next week, if that's ok?

Perfectly fine with me.

[jbeich]

I'm not familar with fwget code and don't use WiFi, so can't review.