soc/intel/skylake: Make use of Intel common DSP block

TEST=Build and boot soraka/eve.

Change-Id: I8be2a90dc4e4c5eb196af57045d2a46b7f0c9722
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/22609
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/include/device/pci_ids.h

@@ -2905,6 +2905,7 @@
 #define PCI_DEVICE_ID_INTEL_APL_AUDIO		0x5a98
 #define PCI_DEVICE_ID_INTEL_GLK_AUDIO		0x3198
 #define PCI_DEVICE_ID_INTEL_CNL_AUDIO		0x9dc8
+#define PCI_DEVICE_ID_INTEL_SKL_AUDIO		0x9d70
 
 /* Intel HECI/ME device Ids */
 #define PCI_DEVICE_ID_INTEL_APL_CSE0		0x5a9a