hw/acpi/ich9: extract ACPI_PM_PROP_TCO_ENABLED from i386/pc

enable_tco is specific to i386/pc.
Suggested-by: NPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: NPhilippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: NIgor Mammedov <imammedo@redhat.com>
Signed-off-by: NMichael Tokarev <mjt@tls.msk.ru>

include/hw/acpi/ich9.h

@@ -63,6 +63,8 @@ typedef struct ICH9LPCPMRegs {
     TCOIORegs tco_regs;
 } ICH9LPCPMRegs;
 
+#define ACPI_PM_PROP_TCO_ENABLED "enable_tco"
+
 void ich9_pm_init(PCIDevice *lpc_pci, ICH9LPCPMRegs *pm,
                   bool smm_enabled,
                   qemu_irq sci_irq);

include/hw/i386/pc.h

@@ -151,8 +151,6 @@ struct PCMachineClass {
 #define PC_MACHINE_CLASS(klass) \
     OBJECT_CLASS_CHECK(PCMachineClass, (klass), TYPE_PC_MACHINE)
 
-#define ACPI_PM_PROP_TCO_ENABLED "enable_tco"
-
 /* parallel.c */
 
 void parallel_hds_isa_init(ISABus *bus, int n);