Input: rohm_bu21023 - use device core to create driver-specific device attributes

Instead of creating driver-specific device attributes with
devm_device_add_group() have device core do this by setting up dev_groups
pointer in the driver structure.

Reviewed-by: Greg Kroah-Hartman <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Dmitry Torokhov <[e-mail]>

drivers/input/touchscreen/rohm_bu21023.c

···
 	&dev_attr_inv_y.attr,
 	NULL,
 };
-
-static const struct attribute_group rohm_ts_attr_group = {
-	.attrs = rohm_ts_attrs,
-};
+ATTRIBUTE_GROUPS(rohm_ts);
 
 static int rohm_ts_device_init(struct i2c_client *client, u8 setup2)
 {
···
 		return error;
 	}
 
-	error = devm_device_add_group(dev, &rohm_ts_attr_group);
-	if (error) {
-		dev_err(dev, "failed to create sysfs group: %d\n", error);
-		return error;
-	}
-
 	return error;
 }
 
···
 static struct i2c_driver rohm_bu21023_i2c_driver = {
 	.driver = {
 		.name = BU21023_NAME,
+		.dev_groups = rohm_ts_groups,
 	},
 	.probe = rohm_bu21023_i2c_probe,
 	.id_table = rohm_bu21023_i2c_id,