drivers: parport: Kconfig: exclude arm64 for PARPORT_PC

Fix build problem seen with arm64:allmodconfig.

drivers/parport/parport_pc.c:67:25: fatal error: asm/parport.h: No such file or
directory

arm64 does not support PARPORT_PC.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>