staging: comedi: me_daq: remove useless for() loop

This for() loop isn't needed. Nothing in the loop uses the 'i'
variable. 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>