staging: comedi: addi_watchdog: all i/o registers are 32-bit

All the i/o registers used by the watchdog device on the addi-data
boards are 32-bit. Make sure all the i/o commands use outl/inl to
access the registers.

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