i2c: Drop explicit initialization of struct i2c_device_id::driver_data to 0

These drivers don't use the driver_data member of struct i2c_device_id,
so don't explicitly initialize this member.

This prepares putting driver_data in an anonymous union which requires
either no initialization or named designators. But it's also a nice
cleanup on its own.

While add it, also remove a comma after the sentinel entry.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>

drivers/i2c/i2c-core-base.c

@@ -1066,8 +1066,8 @@ EXPORT_SYMBOL(i2c_find_device_by_fwnode);
 
 
 static const struct i2c_device_id dummy_id[] = {
-	{ "dummy", 0 },
-	{ },
+	{ "dummy" },
+	{ }
 };
 
 static int dummy_probe(struct i2c_client *client)

drivers/i2c/i2c-slave-testunit.c

@@ -162,7 +162,7 @@ static void i2c_slave_testunit_remove(struct i2c_client *client)
 }
 
 static const struct i2c_device_id i2c_slave_testunit_id[] = {
-	{ "slave-testunit", 0 },
+	{ "slave-testunit" },
 	{ }
 };
 MODULE_DEVICE_TABLE(i2c, i2c_slave_testunit_id);

drivers/i2c/i2c-smbus.c

@@ -160,7 +160,7 @@ static void smbalert_remove(struct i2c_client *ara)
 }
 
 static const struct i2c_device_id smbalert_ids[] = {
-	{ "smbus_alert", 0 },
+	{ "smbus_alert" },
 	{ /* LIST END */ }
 };
 MODULE_DEVICE_TABLE(i2c, smbalert_ids);

drivers/i2c/muxes/i2c-mux-pca9541.c

@@ -78,7 +78,7 @@ struct pca9541 {
 };
 
 static const struct i2c_device_id pca9541_id[] = {
-	{"pca9541", 0},
+	{ "pca9541" },
 	{}
 };