Staging: comedi: adv_pci1710: a line over 80 characters resolved

An issue in 'line over 80 characters' fixed by taking back over-lined comment
a few characters.

Signed-off-by: Sam Asadi <asadi.samuel@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>