ASoC: SOF: debug: No need to export the snd_sof_debugfs_io_item()

The snd_sof_debugfs_io_item() only used within debug.c, no need to export
it.
Signed-off-by: NPeter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: NDaniel Baluta <daniel.baluta@gmail.com>
Reviewed-by: NRanjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: NGuennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Link: https://lore.kernel.org/r/20210915122116.18317-13-peter.ujfalusi@linux.intel.comSigned-off-by: NMark Brown <broonie@kernel.org>

sound/soc/sof/debug.c

@@ -546,7 +546,7 @@ static const struct file_operations sof_dfs_fops = {
 };
 
 /* create FS entry for debug files that can expose DSP memories, registers */
-int snd_sof_debugfs_io_item(struct snd_sof_dev *sdev,
+static int snd_sof_debugfs_io_item(struct snd_sof_dev *sdev,
 				   void __iomem *base, size_t size,
 				   const char *name,
 				   enum sof_debugfs_access_type access_type)
@@ -586,7 +586,6 @@ int snd_sof_debugfs_io_item(struct snd_sof_dev *sdev,
 
 	return 0;
 }
-EXPORT_SYMBOL_GPL(snd_sof_debugfs_io_item);
 
 int snd_sof_debugfs_add_region_item_iomem(struct snd_sof_dev *sdev,
 					  enum snd_sof_fw_blk_type blk_type, u32 offset,

sound/soc/sof/sof-priv.h

@@ -521,10 +521,6 @@ void snd_sof_release_trace(struct snd_sof_dev *sdev);
 void snd_sof_free_trace(struct snd_sof_dev *sdev);
 int snd_sof_dbg_init(struct snd_sof_dev *sdev);
 void snd_sof_free_debug(struct snd_sof_dev *sdev);
-int snd_sof_debugfs_io_item(struct snd_sof_dev *sdev,
-			    void __iomem *base, size_t size,
-			    const char *name,
-			    enum sof_debugfs_access_type access_type);
 int snd_sof_debugfs_buf_item(struct snd_sof_dev *sdev,
 			     void *base, size_t size,
 			     const char *name, mode_t mode);