stubs: move acpi stubs to hw/acpi

No need to include them in libqemustub.a, since only system emulators
need them.
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

hw/acpi/Makefile.objs

@@ -4,7 +4,11 @@ common-obj-$(CONFIG_ACPI_CPU_HOTPLUG) += cpu_hotplug.o
 common-obj-$(CONFIG_ACPI_MEMORY_HOTPLUG) += memory_hotplug.o
 common-obj-$(CONFIG_ACPI_CPU_HOTPLUG) += cpu.o
 common-obj-$(CONFIG_ACPI_NVDIMM) += nvdimm.o
-common-obj-$(CONFIG_ACPI) += acpi_interface.o
-common-obj-$(CONFIG_ACPI) += bios-linker-loader.o
-common-obj-$(CONFIG_ACPI) += aml-build.o
-common-obj-$(call land,$(CONFIG_ACPI),$(CONFIG_IPMI)) += ipmi.o
+
+common-obj-y += acpi_interface.o
+common-obj-y += bios-linker-loader.o
+common-obj-y += aml-build.o
+
+common-obj-$(CONFIG_IPMI) += ipmi.o
+common-obj-$(call lnot,$(CONFIG_IPMI)) += ipmi-stub.o
+common-obj-$(CONFIG_ALL) += ipmi-stub.o

stubs/Makefile.objs

@@ -44,6 +44,5 @@ stub-obj-y += target-monitor-defs.o
 stub-obj-y += target-get-monitor-def.o
 stub-obj-y += vhost.o
 stub-obj-y += iohandler.o
-stub-obj-y += ipmi.o
 stub-obj-y += pc_madt_cpu_entry.o
 stub-obj-y += migration-colo.o