staging: comedi: amplc_pc263: Correct initial state

The initial state of the relays is being read incorrectly.  It's reading
a single 8-bit port twice, but should be reading two consecutive 8-bit
ports.  Fix it.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>