[PNPACPI] Ignore devices that have no resources

Ignore devices that don't have a _CRS method.
They are useless for the PNP layer as they don't provide any resources.

Cc: Adam Belay <ambx1@neo.rr.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLen Brown <len.brown@intel.com>

drivers/pnp/pnpacpi/core.c

@@ -131,7 +131,8 @@ static int __init pnpacpi_add_device(struct acpi_device *device)
 	struct pnp_id *dev_id;
 	struct pnp_dev *dev;
 
-	if (!ispnpidacpi(acpi_device_hid(device)) ||
+	status = acpi_get_handle(device->handle, "_CRS", &temp);
+	if (ACPI_FAILURE(status) || !ispnpidacpi(acpi_device_hid(device)) ||
 		is_exclusive_device(device))
 		return 0;