staging: comedi: addi_apci_3xxx: clean up i_APCI3XXX_Reset()

Rename the CamelCase function and variables.

Remove the extra comments. Leave the main comments to help with further
cleanup of this driver.

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