hisax: hfc_usb: update to current CVS version

- killed paranoid NULL Pointer check
- human readable LED states
- support for "Eicon DIVA USB 4.0" (0x071d/0x1005)

Signed-off-by: Martin Bachem <info@colognechip.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>