MAINTAINERS: Remove bouncing email in ARM ACPI

MAINTAINERS: Remove bouncing email in ARM ACPI

Shannon Zhao's email at Huawei is bouncing: remove it.

    X-Failed-Recipients: [email protected]
    ** Address not found **
    Your message wasn't delivered to [email protected] because the address couldn't be found, or is unable to receive mail.

Note that the section still contains his personal email (see e59f13d76bb).

Signed-off-by: Philippe Mathieu-Daudé <[email protected]>
Acked-by: Shannon Zhao <[email protected]>
Message-id: 20181029195931[email protected]
Signed-off-by: Peter Maydell <[email protected]>