x86: Add sound support for samus

Enable sound on samus using the broadwell I2S and an RT5677 audio codec.

Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/sound/Makefile b/drivers/sound/Makefile
index 452a5a1..e155041 100644
--- a/drivers/sound/Makefile
+++ b/drivers/sound/Makefile
@@ -18,5 +18,5 @@
 obj-$(CONFIG_SOUND_INTEL_HDA)	+= hda_codec.o
 obj-$(CONFIG_SOUND_I8254)	+= i8254_beep.o
 obj-$(CONFIG_SOUND_RT5677)	+= rt5677.o
-obj-$(CONFIG_INTEL_BROADWELL)	+= broadwell_i2s.o #broadwell_sound.o
+obj-$(CONFIG_INTEL_BROADWELL)	+= broadwell_i2s.o broadwell_sound.o
 obj-$(CONFIG_SOUND_IVYBRIDGE)	+= ivybridge_sound.o