x86: broadwell: Add support for the ADSP

The Application Digital Signal Processor is used for sound processing with
broadwell. Add a driver to support this.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/arch/x86/cpu/broadwell/Makefile b/arch/x86/cpu/broadwell/Makefile
index a032861..d3785aa 100644
--- a/arch/x86/cpu/broadwell/Makefile
+++ b/arch/x86/cpu/broadwell/Makefile
@@ -2,6 +2,7 @@
 #
 # Copyright (c) 2016 Google, Inc
 
+obj-y += adsp.o
 obj-y += cpu.o
 obj-y += iobp.o
 obj-y += lpc.o