ACPI: bus: Eliminate acpi_bus_get_device()

Replace the last instance of acpi_bus_get_device(), added recently
by commit 87e59b36e5e2 ("spi: Support selection of the index of the
ACPI Spi Resource before alloc"), with acpi_fetch_acpi_dev() and
finally drop acpi_bus_get_device() that has no more users.

Signed-off-by: Rafael J. Wysocki <[e-mail]>
Acked-by: Mark Brown <[e-mail]>

drivers/acpi/scan.c

···
 	return adev;
 }
 
-int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device)
-{
-	if (!device)
-		return -EINVAL;
-
-	*device = handle_to_device(handle, NULL);
-	if (!*device)
-		return -ENODEV;
-
-	return 0;
-}
-EXPORT_SYMBOL(acpi_bus_get_device);
-
 /**
  * acpi_fetch_acpi_dev - Retrieve ACPI device object.
  * @handle: ACPI handle associated with the requested ACPI device object.

drivers/spi/spi.c

···
 			} else {
 				struct acpi_device *adev;
 
-				if (acpi_bus_get_device(parent_handle, &adev))
+				adev = acpi_fetch_acpi_dev(parent_handle);
+				if (!adev)
 					return -ENODEV;
 
 				ctlr = acpi_spi_find_controller_by_adev(adev);

include/acpi/acpi_bus.h

···
  * External Functions
  */
 
-int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device);
 struct acpi_device *acpi_fetch_acpi_dev(acpi_handle handle);
 acpi_status acpi_bus_get_status_handle(acpi_handle handle,
 				       unsigned long long *sta);