Staging: speakup: serialio: Fixed errors in file

On line 40 printk() needed an KERN_* facility level, so I gave it
INFO. Also, fixed a C99 comment error.

Signed-off-by: Tracey Dent <tdent48227@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>