northbridge/amd: Add the audio device to the PCI devices

Change-Id: I826f98e450c9a614930a5e83c7c6bfb4ccdc5984
Signed-off-by: Dave Frodin <dave.frodin@se-eng.com>
Reviewed-on: http://review.coreboot.org/7630
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-by: Bruce Griffith <Bruce.Griffith@se-eng.com>

src/northbridge/amd/agesa/family16kb/pci_devs.h

@@ -27,6 +27,10 @@
 #define GFX_FUNC 0
 #define GFX_DEVFN PCI_DEVFN(GFX_DEV,GFX_FUNC)
 
+/* Internal Audio Controller */
+#define ACTL_FUNC	1
+#define ACTL_DEVFN	PCI_DEVFN(GFX_DEV,ACTL_FUNC)
+
 /* PCIe Ports */
 #define NB_PCIE_PORT1_DEV 0x1
 #define NB_PCIE_PORT2_DEV 0x2