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>

src/soc/intel/skylake/chip.h

@@ -208,6 +208,12 @@ struct soc_intel_skylake_config {
 	u8 EnableAzalia;
 	u8 DspEnable;
 
+	/* HDA Virtual Channel Type Select */
+	enum {
+		Vc0,
+		Vc1,
+	} PchHdaVcType;
+
 	/*
 	 * I/O Buffer Ownership:
 	 * 0: HD-A Link