USB: unusual_devs update for Nokia 6131

This patch (as991) updates the unusual_devs entry for the Nokia 6131
phone.  As reported by Juan Ignacio Cherrutti, there's new firmware
available but it still has the same old transfer-size limit.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>