i2c: parport: move include file into main source

After removal of the parport-light driver, this include is used by the
parport driver exclusively and can be included in the main source. Move
module parameter declarations to its variable declaration while here.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>