drivers: staging: ft1000: Use pr_info instead of printk

Improve coding style by fixing this checkstyle warning:

WARNING: Prefer [subsystem eg: netdev]_info([subsystem]dev, ... then dev_info(dev, ... then pr_info(...  to printk(KERN_INFO ...

Signed-off-by: Artem Fetishev <wwctrsrx@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>