i2c: Update for new sequence numbers

Use the new sequence number in all cases. Drop the logic to check for a
valid number in designware_i2c, since it will always be valid.

Also drop the numbering in the uclass, since we can rely on driver
model giving us the right sequence numbers.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/i2c/i2c-uclass.c b/drivers/i2c/i2c-uclass.c
index 490437b..456cf3b 100644
--- a/drivers/i2c/i2c-uclass.c
+++ b/drivers/i2c/i2c-uclass.c
@@ -686,27 +686,11 @@
 #endif
 }
 
-struct i2c_priv {
-	int max_id;
-};
-
 static int i2c_post_bind(struct udevice *dev)
 {
-	struct uclass *class = dev->uclass;
-	struct i2c_priv *priv = class->priv;
 	int ret = 0;
 
-	/* Just for sure */
-	if (!priv)
-		return -ENOMEM;
-
-	debug("%s: %s, req_seq=%d\n", __func__, dev->name, dev->req_seq);
-
-	/* if there is no alias ID, use the first free */
-	if (dev->req_seq == -1)
-		dev->req_seq = ++priv->max_id;
-
-	debug("%s: %s, new req_seq=%d\n", __func__, dev->name, dev->req_seq);
+	debug("%s: %s, seq=%d\n", __func__, dev->name, dev_seq(dev));
 
 #if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
 	ret = dm_scan_fdt_dev(dev);
@@ -714,32 +698,11 @@
 	return ret;
 }
 
-int i2c_uclass_init(struct uclass *class)
-{
-	struct i2c_priv *priv = class->priv;
-
-	/* Just for sure */
-	if (!priv)
-		return -ENOMEM;
-
-	/* Get the last allocated alias. */
-	if (CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA))
-		priv->max_id = dev_read_alias_highest_id("i2c");
-	else
-		priv->max_id = -1;
-
-	debug("%s: highest alias id is %d\n", __func__, priv->max_id);
-
-	return 0;
-}
-
 UCLASS_DRIVER(i2c) = {
 	.id		= UCLASS_I2C,
 	.name		= "i2c",
 	.flags		= DM_UC_FLAG_SEQ_ALIAS,
 	.post_bind	= i2c_post_bind,
-	.init		= i2c_uclass_init,
-	.priv_auto	= sizeof(struct i2c_priv),
 	.pre_probe      = i2c_pre_probe,
 	.post_probe	= i2c_post_probe,
 	.per_device_auto	= sizeof(struct dm_i2c_bus),