Move the documentation for Amiga CD32 together with other parallel port
joysticks.
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Now that all files under Documentation/input follows the ReST markup
language, rename them to *.rst and create a book for the Linux Input
subsystem.
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>