parport: convert drivers/parport/* to use module_platform_driver()

This patch converts the drivers in drivers/parport/* to use the
module_platform_driver() macro which makes the code smaller and a bit
simpler.

Cc: Ben Dooks <ben@simtec.co.uk>
Cc: Derrick J. Brashear <shadow@dementia.org>
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>