audio-kernel: asoc: ipc: add support for MDSP target

Add support for MDSP based targets.

Change-Id: Iac1402db89b321e85d4ccdb3863d697484c8251e
Signed-off-by: Josh Kirsch <jkirsch@codeaurora.org>

ipc/apr_v3.c

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
- * Copyright (c) 2013-2016, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2013-2016, 2019 The Linux Foundation. All rights reserved.
  */
 
 #include <linux/types.h>
@@ -13,10 +13,16 @@
 
 #define DEST_ID APR_DEST_MODEM
 
+/**
+ * apr_get_subsys_state - get modem subsys status
+ *
+ * Returns apr_subsys_state
+ */
 enum apr_subsys_state apr_get_subsys_state(void)
 {
 	return apr_get_modem_state();
 }
+EXPORT_SYMBOL(apr_get_subsys_state);
 
 void apr_set_subsys_state(void)
 {