soc/intel/skylake: devicetree: introduce PchHdaVcType fsp parameter

Make the the FSP Parameter PchHdaVcType a devicetree setting and make
use of it in the devicetrees of all boards that currently set it.

Signed-off-by: Michael Niewöhner <foss@mniewoehner.de>
Change-Id: Ibafc3b6bd2495658f2bd634218042ec413a89f5e
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35542
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Maxim Polyakov <max.senia.poliak@gmail.com>
diff --git a/src/mainboard/supermicro/x11-lga1151-series/variants/x11ssh-tf/overridetree.cb b/src/mainboard/supermicro/x11-lga1151-series/variants/x11ssh-tf/overridetree.cb
index 1039f7a..09aa8b5 100644
--- a/src/mainboard/supermicro/x11-lga1151-series/variants/x11ssh-tf/overridetree.cb
+++ b/src/mainboard/supermicro/x11-lga1151-series/variants/x11ssh-tf/overridetree.cb
@@ -30,6 +30,9 @@
 	register "PcieRpEnable[8]" = "1"
 	register "PcieRpClkReqSupport[8]" = "0"
 
+	# FIXME: find out why FSP crashes without this
+	register "PchHdaVcType" = "Vc1"
+
 	device domain 0 on
 		device pci 01.0 on end	# unused
 		device pci 01.1 on	# PCIE Slot (JPCIE1)