acer-wmi: Use acpi_dev_found()

Use shiny new acpi_dev_found() and remove all the boilerplate
to search for a particular ACPI device. No functional change.
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Reviewed-by: Lee, Chun-Yi <jlee@suse.com>
Acked-by: Darren Hart <dvhart@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/platform/x86/acer-wmi.c

@@ -793,15 +793,6 @@ static acpi_status __init AMW0_find_mailled(void)
 	return AE_OK;
 }
 
-static int AMW0_set_cap_acpi_check_device_found __initdata;
-
-static acpi_status __init AMW0_set_cap_acpi_check_device_cb(acpi_handle handle,
-	u32 level, void *context, void **retval)
-{
-	AMW0_set_cap_acpi_check_device_found = 1;
-	return AE_OK;
-}
-
 static const struct acpi_device_id norfkill_ids[] __initconst = {
 	{ "VPC2004", 0},
 	{ "IBM0068", 0},
@@ -816,9 +807,10 @@ static int __init AMW0_set_cap_acpi_check_device(void)
 	const struct acpi_device_id *id;
 
 	for (id = norfkill_ids; id->id[0]; id++)
-		acpi_get_devices(id->id, AMW0_set_cap_acpi_check_device_cb,
-				NULL, NULL);
-	return AMW0_set_cap_acpi_check_device_found;
+		if (acpi_dev_found(id->id))
+			return true;
+
+	return false;
 }
 
 static acpi_status __init AMW0_set_capabilities(void)