Staging: comedi: addi-data: cleanup conditional blocks in hwdrv_apci035.c

There were some conditional blocks that had an unnecessary level of
indentation in them.  We can remove this to improve code clarity.

Signed-off-by: Chase Southwood <chase.southwood@yahoo.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>