Staging: comedi: drivers: das08: Add whitespace to driver comment block

Previous whitespace changes to das08.c removed some whitespace from a
"driver comment block" that the Comedi team would like to keep.  "Header
continuation lines" in this comment block should be indented with
whitespace.  (This is after the " * " at the start of each line.)
Signed-off-by: NIan Abbott <abbotti@mev.co.uk>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>