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/designware_i2c_pci.c b/drivers/i2c/designware_i2c_pci.c
index 3c15320..18eef62 100644
--- a/drivers/i2c/designware_i2c_pci.c
+++ b/drivers/i2c/designware_i2c_pci.c
@@ -90,32 +90,12 @@
 
 static int designware_i2c_pci_bind(struct udevice *dev)
 {
-	struct uclass *uc;
 	char name[20];
-	int ret;
 
 	if (dev_of_valid(dev))
 		return 0;
 
-	/*
-	 * Create a unique device name for PCI type devices
-	 * ToDo:
-	 * Setting req_seq in the driver is probably not recommended.
-	 * But without a DT alias the number is not configured. And
-	 * using this driver is impossible for PCIe I2C devices.
-	 * This can be removed, once a better (correct) way for this
-	 * is found and implemented.
-	 *
-	 * TODO(sjg@chromium.org): Perhaps if uclasses had platdata this would
-	 * be possible. We cannot use static data in drivers since they may be
-	 * used in SPL or before relocation.
-	 */
-	ret = uclass_get(UCLASS_I2C, &uc);
-	if (ret)
-		return ret;
-
-	dev->req_seq = uclass_find_next_free_req_seq(uc);
-	sprintf(name, "i2c_designware#%u", dev->req_seq);
+	sprintf(name, "i2c_designware#%u", dev_seq(dev));
 	device_set_name(dev, name);
 
 	return 0;