staging: comedi: hwdrv_apci1500: miscellaneous cleanup

staging: comedi: hwdrv_apci1500: miscellaneous cleanup

This patch completes two final matters of cleanup which are each too small
for their own patch.  It corrects a couple of indentation issues and
removes a return statement at the end of a void function.

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