dm: Drop the unused arg in uclass_find_device_by_seq()

Now that there is only one sequence number (rather than both requested and
assigned ones) we can simplify this function. Also update its caller to
simplify the logic.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/usb/host/usb-uclass.c b/drivers/usb/host/usb-uclass.c
index fee92c9..a2bd743 100644
--- a/drivers/usb/host/usb-uclass.c
+++ b/drivers/usb/host/usb-uclass.c
@@ -394,7 +394,7 @@
 	int ret;
 
 	/* Find the old device and remove it */
-	ret = uclass_find_device_by_seq(UCLASS_USB, 0, true, &dev);
+	ret = uclass_find_device_by_seq(UCLASS_USB, 0, &dev);
 	if (ret)
 		return ret;
 	ret = device_remove(dev, DM_REMOVE_NORMAL);
@@ -417,7 +417,7 @@
 	int ret;
 
 	/* Find the old device and remove it */
-	ret = uclass_find_device_by_seq(UCLASS_USB, 0, true, &dev);
+	ret = uclass_find_device_by_seq(UCLASS_USB, 0, &dev);
 	if (ret)
 		return ret;
 	ret = device_remove(dev, DM_REMOVE_NORMAL);