Revert "rtac: Reduce RTAC buffer size"

This reverts commit 9e16937a1af292cd9bb8035cb135db3914b87dc4.

-Retain max buffer size in driver, it is userspace which
defines payload length size which gets passed to dsp.

Change-Id: I65982f6ee45ce1e021cdc0f6fe035435be3d208e
Signed-off-by: Sachin Mohan Gadag <sgadag@codeaurora.org>
diff --git a/dsp/rtac.c b/dsp/rtac.c
index 0455779..a4dec9a 100644
--- a/dsp/rtac.c
+++ b/dsp/rtac.c
@@ -35,7 +35,7 @@
 #define MAX_PAYLOAD_SIZE		4076
 #define RTAC_MAX_ACTIVE_VOICE_COMBOS	2
 #define RTAC_MAX_ACTIVE_POPP		8
-#define RTAC_BUF_SIZE			57344
+#define RTAC_BUF_SIZE			163840
 
 #define TIMEOUT_MS	1000