acpi: add acpi_preset_companion() stub

Add a stub for acpi_preset_companion().  Fixes build failures when
acpi_preset_companion() is used and CONFIG_ACPI is not set.

Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Dustin Byford <dustin@cumulusnetworks.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>