staging: comedi: s626: #if 0 out the "SAA7146 BUG WORKAROUND"

Until it's determined if this workaround can be removed, block
out the code with an #if 0/#endif and remove the individual
comments on each line.

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