MAINTAINERS: Add ACPI/HEST/GHES entries

I and Xiang are willing to review the APEI-related patches and
volunteer as the reviewers for the HEST/GHES part.

Signed-off-by: Dongjiu Geng <gengdongjiu@huawei.com>
Signed-off-by: Xiang Zheng <zhengxiang9@huawei.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Message-id: 20200512030609.19593-11-gengdongjiu@huawei.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

MAINTAINERS

@@ -1516,6 +1516,15 @@ F: tests/qtest/bios-tables-test.c
 F: tests/qtest/acpi-utils.[hc]
 F: tests/data/acpi/
 
+ACPI/HEST/GHES
+R: Dongjiu Geng <gengdongjiu@huawei.com>
+R: Xiang Zheng <zhengxiang9@huawei.com>
+L: qemu-arm@nongnu.org
+S: Maintained
+F: hw/acpi/ghes.c
+F: include/hw/acpi/ghes.h
+F: docs/specs/acpi_hest_ghes.rst
+
 ppc4xx
 M: David Gibson <david@gibson.dropbear.id.au>
 L: qemu-ppc@nongnu.org