azalia: Shrink boilerplate

Change-Id: Ib3e09644c0ee71aacb067adaa85653d151b52078
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: http://review.coreboot.org/6840
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>

src/device/Makefile.inc

@@ -14,6 +14,10 @@ ramstage-$(CONFIG_PCI) += pci_ops.c
 ramstage-$(CONFIG_PCI) += pci_early.c
 ramstage-y += smbus_ops.c
 
+ifeq ($(CONFIG_AZALIA_PLUGIN_SUPPORT),y)
+ramstage-srcs += src/mainboard/$(MAINBOARDDIR)/hda_verb.c
+endif
+
 romstage-y += device_romstage.c
 romstage-$(CONFIG_PCI) += pci_early.c