Change the probing order priority of acpi so that acpi is probed after

pcib instance is initialized because accesses to PCI_Config region can
occur during ACPI initialization.
Note that this is a short term solution, more consideration will be
required in order to integrate ACPI into the newbus probe sequence.

sys/dev/acpi/acpi.c

@@ -1238,7 +1238,7 @@ acpi_identify(driver_t *driver, device_t parent)
 {
 	device_t        child;
 
-	child = BUS_ADD_CHILD(parent, 0, "acpi", 0);
+	child = BUS_ADD_CHILD(parent, 101, "acpi", 0);	/* after pcib(100) */
 
 	if (child == NULL) {
 		panic("acpi_identify");