Make ehci deal with pci devices that have multiple companion functions and
ehci functions. We can't assume that there will only be one ehci per device.
The existing code could not deal with:

Netmos

Make ehci deal with pci devices that have multiple companion functions and
ehci functions. We can't assume that there will only be one ehci per device.
The existing code could not deal with:

Netmos MCS9990 Quad USB 2.0 Port (USB serial bus, interface 0x10) at pci1 dev 0 function 0 not configured
Netmos MCS9990 Quad USB 2.0 Port (USB serial bus, interface 0x20) at pci1 dev 0 function 1 not configured
Netmos MCS9990 Quad USB 2.0 Port (USB serial bus, interface 0x10) at pci1 dev 0 function 2 not configured
Netmos MCS9990 Quad USB 2.0 Port (USB serial bus, interface 0x20) at pci1 dev 0 function 3 not configured
Netmos MCS9990 Quad USB 2.0 Port (USB serial bus, interface 0x10) at pci1 dev 0 function 4 not configured
Netmos MCS9990 Quad USB 2.0 Port (USB serial bus, interface 0x20) at pci1 dev 0 function 5 not configured
Netmos MCS9990 Quad USB 2.0 Port (USB serial bus, interface 0x10) at pci1 dev 0 function 6 not configured
Netmos MCS9990 Quad USB 2.0 Port (USB serial bus, interface 0x20) at pci1 dev 0 function 7 not configured

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Remove clause 3 and 4 from TNF licenses

split device/softc for USB host controllers and the usb (control)
device,
this is hairy stuff, and I've only tested with uhci/ehci at pci,
please test the rest and report problems

Use the correct years for copyright.

Make ehci_pci.c compiles again.

Add some data structures to keep enable finding companion controllers
for EHCI.