sound: x86: link: Add sound support

Add sound support for link, using the HDA codec implementation.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/arch/x86/cpu/ivybridge/Kconfig b/arch/x86/cpu/ivybridge/Kconfig
index 5f0e608..2f42393 100644
--- a/arch/x86/cpu/ivybridge/Kconfig
+++ b/arch/x86/cpu/ivybridge/Kconfig
@@ -21,6 +21,7 @@
 	imply USB_EHCI_HCD
 	imply USB_XHCI_HCD
 	imply VIDEO_VESA
+	imply SOUND_IVYBRIDGE
 
 if NORTHBRIDGE_INTEL_IVYBRIDGE