Staging: comedi: adv_pci1710: a line over 80 fixed

A 'line over 80' issue fixed, by removing comment to previous line. And
also, by this, 'a blank line' isssue resolved.

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