usb: create common header virtual root hub descriptors

Many USB host controller drivers contain almost identical copies of the
same virtual root hub descriptors. Put these into a common file to avoid
duplication.

Note that there were some very minor differences between the descriptors
in the various files, such as:

- USB 1.0 vs. USB 1.1
- Manufacturer/Device ID
- Max packet size
- String content

I assume these aren't relevant.

Cc: Thomas Lange <[email protected]>
Cc: Shinya Kuribayashi <[email protected]>
Cc: Gary Jennejohn <[email protected]>
Cc: Wolfgang Denk <[email protected]>
Cc: Eric Millbrandt <[email protected]>
Cc: Pierre Aubert <[email protected]>
Cc: Stefan Roese <[email protected]>
Cc: Daniel Hellstrom <[email protected]>
Cc: Denis Peter <[email protected]>
Cc: Rodolfo Giometti <[email protected]>
Cc: Zhang Wei <[email protected]>
Cc: Mateusz Zalega <[email protected]>
Cc: Remy Bohmer <[email protected]>
Cc: Markus Klotzbuecher <[email protected]>
Cc: Minkyu Kang <[email protected]>
Cc: Gary Jennejohn <[email protected]>
Cc: C Nauman <[email protected]>
Cc: David Müller <[email protected]>
Cc: Yoshihiro Shimoda <[email protected]>
Cc: Nobuhiro Iwamatsu <[email protected]>
Cc: Thomas Abraham <[email protected]>
Cc: Tom Rini <[email protected]>
Cc: Andrew Murray <[email protected]>
Cc: Matej Frančeškin <[email protected]>
Cc: Cliff Cai <[email protected]>
Cc: Bryan Wu <[email protected]>
Signed-off-by: Stephen Warren <[email protected]>

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