USB/U3G: Added Panasonic CF-F9 GOBI 3G modem to U3G module.

Add kernel support for the Panasonic GOBI 3g modem.

Note: GOBI modems require QDL firmware to be uploaded with gobi_loader:
https://github.com/cederom/gobi_loader.

Signed-off-by: CeDeROM Tomasz CEDRO <tomek@cedro.info>
Pull Request: https://github.com/freebsd/freebsd-src/pull/115
Reviewed by: imp (split off kernel bits from original)