Staging: Comedi adv_pci1710 : Corrected over 80 column warnings

Various comments and code lines longer than 80 chars fixed in file adv_pci1710.c.

Signed-off-by: Tomas Melin <tomas.melin@iki.fi>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>