Revert "soundwire: add sdw_slave_wait_for_initialization helper"

This reverts commit e7706a4.
We should ensure the device is fully operational when it is resumed.

Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>

Author: bardliao

drivers/soundwire/slave.c

@@ -104,23 +104,6 @@ int sdw_slave_add(struct sdw_bus *bus,
 }
 EXPORT_SYMBOL(sdw_slave_add);
 
-int sdw_slave_wait_for_initialization(struct sdw_slave *slave, unsigned int timeout)
-{
-	unsigned long time;
-
-	time = wait_for_completion_timeout(&slave->initialization_complete,
-				msecs_to_jiffies(timeout));
-	if (!time) {
-		dev_err(&slave->dev, "%s: Initialization not complete, timed out\n", __func__);
-		sdw_show_ping_status(slave->bus, true);
-
-		return -ETIMEDOUT;
-	}
-
-	return 0;
-}
-EXPORT_SYMBOL(sdw_slave_wait_for_initialization);
-
 #if IS_ENABLED(CONFIG_ACPI)
 
 static bool find_slave(struct sdw_bus *bus,

include/linux/soundwire/sdw.h

@@ -1087,7 +1087,6 @@ int sdw_stream_remove_slave(struct sdw_slave *slave,
 			    struct sdw_stream_runtime *stream);
 
 int sdw_slave_get_scale_index(struct sdw_slave *slave, u8 *base);
-int sdw_slave_wait_for_initialization(struct sdw_slave *slave, unsigned int timeout);
 
 /* messaging and data APIs */
 int sdw_read(struct sdw_slave *slave, u32 addr);