hw/vfio: Fix typo in comments

Fix typo in comments:
*programatically  ==> programmatically
*disconecting  ==> disconnecting
*mulitple  ==> multiple
*timout  ==> timeout
*regsiter  ==> register
*forumula  ==> formula

Signed-off-by: Cai Huoqing <caihuoqing@baidu.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20210730012613.2198-1-caihuoqing@baidu.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>