dsp: Make error as debug log when CPU buffer not available

When CPU buffer is not available, continuous error
log prints leads to excessive logging. Make the error
as debug log to avoid this.

Change-Id: Ic26006b4975fbe3d5467203d145a517c0067c296
Signed-off-by: Aditya Bavanari <[email protected]>

dsp/q6asm.c

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
- * Copyright (c) 2012-2019, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2012-2020, The Linux Foundation. All rights reserved.
  * Author: Brian Swetland <[email protected]>
  *
  * This software is licensed under the terms of the GNU General Public
@@ -2552,7 +2552,7 @@ void *q6asm_is_cpu_buf_avail(int dir, struct audio_client *ac, uint32_t *size,
 			/* To make it more robust, we could loop and get the
 			 * next avail buf, its risky though
 			 */
-			pr_err("%s: Next buf idx[0x%x] not available, dir[%d]\n",
+			pr_debug("%s: Next buf idx[0x%x] not available, dir[%d]\n",
 			 __func__, idx, dir);
 			mutex_unlock(&port->lock);
 			return NULL;