configs: qemu: add config fragment for ACPI

Provide a configuration fragment to enable ACPI on QEMU.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Acked-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/MAINTAINERS b/MAINTAINERS
index 417061a..0dedb42 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -53,6 +53,7 @@
 ACPI:
 M:	Simon Glass <sjg@chromium.org>
 S:	Maintained
+F:	board/emulation/configs/acpi.config
 F:	cmd/acpi.c
 F:	lib/acpi/