staging: comedi: amplc_pci230: alignment should match open parenthesis

Fix checkpatch issue: "CHECK: Alignment should match open parenthesis".

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