tools/intel_audio_dump: add support for Cherryview

This patch adds support for dumping audio registers of Cherryview.

Signed-off-by: Libin Yang <libin.yang@intel.com>
diff --git a/lib/intel_reg.h b/lib/intel_reg.h
index fcc9d7c..ade1c0c 100644
--- a/lib/intel_reg.h
+++ b/lib/intel_reg.h
@@ -1274,6 +1274,8 @@
 #define SDVO_PIPE_B_SELECT			(1 << 30)
 #define SDVO_STALL_SELECT			(1 << 29)
 #define SDVO_INTERRUPT_ENABLE			(1 << 26)
+
+#define DISPLAY_HOTPLUG_CTL 0x61164
 /*
  * 915G/GM SDVO pixel multiplier.
  *