Kconfig: Select UDK2017

On platforms using UDK2015 select UDK2017 instead.
This allows to drop UDK2015 headers.

Tested using timeless builds: The produced binaries are identical.

Change-Id: Ia6032c6520ec889cd63655db982d9bfa476dc24d
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/62984
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
diff --git a/src/soc/intel/skylake/Kconfig b/src/soc/intel/skylake/Kconfig
index ef505da..692a15b 100644
--- a/src/soc/intel/skylake/Kconfig
+++ b/src/soc/intel/skylake/Kconfig
@@ -85,7 +85,7 @@
 	select TSC_MONOTONIC_TIMER
 	select TSC_SYNC_MFENCE
 	select UDELAY_TSC
-	select UDK_2015_BINDING
+	select UDK_2017_BINDING
 	select USE_FSP_NOTIFY_PHASE_POST_PCI_ENUM
 	select USE_FSP_NOTIFY_PHASE_READY_TO_BOOT
 	select USE_FSP_NOTIFY_PHASE_END_OF_FIRMWARE