staging: comedi: addi_eeprom: reformat driver comment

Reformat the driver description comment to use the preferred block
comment style.

The second driver comment block contains the same information as
the first one. Remove it.

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