staging: comedi: pcl816: remove TRIG_WAKE_EOS support stub

The support code for this command flag is commented out. Just remove
it.

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