Minor tweaks to the ethernet gadget driver:

 - mention that it requires full-duplex hardware
 - correct the string description:  they're always UTF-8
 - fix minor C error: don't "&array" (Al Borchers)
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>