ASoC: msm: Add timestamp support for compressed audio

The timestamp would be used by applications for AVSYNC purpose.

Change-Id: I416c38e82fbd51b58df119c0122bcd629ccd88fd
Signed-off-by: Asish Bhattacharya <asishb@codeaurora.org>
diff --git a/include/sound/compress_offload.h b/include/sound/compress_offload.h
index 423264d..f746780 100644
--- a/include/sound/compress_offload.h
+++ b/include/sound/compress_offload.h
@@ -56,6 +56,7 @@
 	size_t decoded;
 	size_t rendered;
 	__u32 sampling_rate;
+	uint64_t timestamp;
 };
 
 /**