MAINTAINERS: Add Tom Talpey as ksmbd reviewer

Tom have been actively reviewing ksmbd patches as well as
smb-direct patches. He agreed to help us as a reviewer,
So adding him to reviewer list in ksmbd entry.

Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Reviewed-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Reviewed-by: Hyunchul Lee <hyc.lee@gmail.com>
Acked-by: Tom Talpey <tom@talpey.com>
Signed-off-by: Steve French <stfrench@microsoft.com>