soundwire: sysfs: remove sdw_slave_sysfs_init()

Now that sdw_slave_sysfs_init() only calls sdw_slave_sysfs_dpn_init(),
just do that instead and remove sdw_slave_sysfs_init() to get it out of
the way to save a bit of logic and code size.

Cc: Vinod Koul <[e-mail]>
Cc: Bard Liao <[e-mail]>
Cc: Pierre-Louis Bossart <[e-mail]>
Cc: Sanyog Kale <[e-mail]>
Cc: [e-mail]
Cc: [e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>
Reviewed-by: Dan Williams <[e-mail]>
Tested-By: Vijendar Mukunda <[e-mail]>
Link: https://lore.kernel.org/r/2024013030-denatured-swaddling-b047@gregkh
Signed-off-by: Vinod Koul <[e-mail]>

drivers/soundwire/bus_type.c

···
 	if (slave->prop.use_domain_irq)
 		sdw_irq_create_mapping(slave);
 
-	/* init the sysfs as we have properties now */
-	ret = sdw_slave_sysfs_init(slave);
+	/* init the dynamic sysfs attributes we need */
+	ret = sdw_slave_sysfs_dpn_init(slave);
 	if (ret < 0)
 		dev_warn(dev, "Slave sysfs init failed:%d\n", ret);
 

drivers/soundwire/sysfs_local.h

···
 extern const struct attribute_group *sdw_attr_groups[];
 
 /* additional device-managed properties reported after driver probe */
-int sdw_slave_sysfs_init(struct sdw_slave *slave);
 int sdw_slave_sysfs_dpn_init(struct sdw_slave *slave);
 
 #endif /* __SDW_SYSFS_LOCAL_H */

drivers/soundwire/sysfs_slave.c

···
 	NULL,
 };
 
-int sdw_slave_sysfs_init(struct sdw_slave *slave)
-{
-	int ret;
-
-	if (slave->prop.source_ports || slave->prop.sink_ports) {
-		ret = sdw_slave_sysfs_dpn_init(slave);
-		if (ret < 0)
-			return ret;
-	}
-
-	return 0;
-}
-
 /*
  * the status is shown in capital letters for UNATTACHED and RESERVED
  * on purpose, to highligh users to the fact that these status values

drivers/soundwire/sysfs_slave_dpn.c

···
 	int ret;
 	int i;
 
+	if (!slave->prop.source_ports && !slave->prop.sink_ports)
+		return 0;
+
 	mask = slave->prop.source_ports;
 	for_each_set_bit(i, &mask, 32) {
 		ret = add_all_attributes(&slave->dev, i, 1);