parport: amiga: use module_platform_driver_probe()

Use module_platform_driver_probe() macro which makes the code smaller
and simpler.

Signed-off-by: Fabio Porcedda <fabio.porcedda@gmail.com>
Cc: Matt Porter <mporter@ti.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>