x86: apl: Drop support for !OF_PLATDATA_PARENT

This code was kept around after of-platdata started supporting parent
devices. That feature seems stable now, so let's drop it.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/x86/cpu/apollolake/Kconfig b/arch/x86/cpu/apollolake/Kconfig
index c6c1350..f5dbd6c 100644
--- a/arch/x86/cpu/apollolake/Kconfig
+++ b/arch/x86/cpu/apollolake/Kconfig
@@ -19,6 +19,7 @@
 	select SMP_AP_WORK
 	select INTEL_GMA_SWSMISCI
 	select ACPI_GNVS_EXTERNAL
+	select TPL_OF_PLATDATA_PARENT
 	imply ENABLE_MRC_CACHE
 	imply AHCI_PCI
 	imply SCSI