ACPI / bind: Move acpi_get_child() to drivers/ide/ide-acpi.c

Since drivers/ide/ide-acpi.c is the only remaining user of
acpi_get_child(), move that function into that file as a static
routine.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/ide/ide-acpi.c

@@ -97,6 +97,17 @@ bool ide_port_acpi(ide_hwif_t *hwif)
 	return ide_noacpi == 0 && hwif->acpidata;
 }
 
+static acpi_handle acpi_get_child(acpi_handle handle, u64 addr)
+{
+	struct acpi_device *adev;
+
+	if (!handle || acpi_bus_get_device(handle, &adev))
+		return NULL;
+
+	adev = acpi_find_child_device(adev, addr, false);
+	return adev ? adev->handle : NULL;
+}
+
 /**
  * ide_get_dev_handle - finds acpi_handle and PCI device.function
  * @dev: device to locate