dsp: codecs: Add synchronization between SSR and native encoder decoder

Add change to use global lock to make synchronization
between SSR and native encoder decoder.

Change-Id: I6c1f48c32d4c8290de8bf3dfa86e022abe2b34bc
Signed-off-by: Saurav Kumar <sauravk@codeaurora.org>

dsp/codecs/q6audio_common.h

@@ -1,5 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
-/* Copyright (c) 2012-2014, 2017 The Linux Foundation. All rights reserved.
+/* Copyright (c) 2012-2014, 2017, 2020 The Linux Foundation. All rights reserved.
  */
 
 
@@ -9,7 +9,7 @@
 
 #include <dsp/apr_audio-v2.h>
 #include <dsp/q6asm-v2.h>
-
+extern spinlock_t enc_dec_lock;
 
 void q6_audio_cb(uint32_t opcode, uint32_t token,
 		uint32_t *payload, void *priv);