staging: comedi: me4000: updata driver status in comedi comment

Firmware loading was fixed by:

Commit: ac584af5


"staging: comedi: me4000: fix firmware downloading"

Change the driver status to "untested" and remove the comments about
the driver being broken,

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>