Compile acpi only once

Use qemu_irqs to trigger CMOS S3 and SMI events.

Avoid using kvm.h, which uses CPUState.

Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
diff --git a/default-configs/mips64el-softmmu.mak b/default-configs/mips64el-softmmu.mak
index ceaf703..425be8f 100644
--- a/default-configs/mips64el-softmmu.mak
+++ b/default-configs/mips64el-softmmu.mak
@@ -12,6 +12,7 @@
 CONFIG_PCSPK=y
 CONFIG_USB_UHCI=y
 CONFIG_FDC=y
+CONFIG_ACPI=y
 CONFIG_IDE_CORE=y
 CONFIG_IDE_QDEV=y
 CONFIG_IDE_PCI=y