dm: Use dm_scan_fdt_dev() directly where possible

Quite a few places have a bind() method which just calls dm_scan_fdt_dev().
We may as well call dm_scan_fdt_dev() directly. Update the code to do this.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/i2c/i2c-uclass.c b/drivers/i2c/i2c-uclass.c
index 16447b8..dbd3789 100644
--- a/drivers/i2c/i2c-uclass.c
+++ b/drivers/i2c/i2c-uclass.c
@@ -498,16 +498,6 @@
 #endif
 }
 
-static int i2c_post_bind(struct udevice *dev)
-{
-#if CONFIG_IS_ENABLED(OF_CONTROL)
-	/* Scan the bus for devices */
-        return dm_scan_fdt_dev(dev);
-#else
-	return 0;
-#endif
-}
-
 static int i2c_child_post_bind(struct udevice *dev)
 {
 #if CONFIG_IS_ENABLED(OF_CONTROL)
@@ -526,7 +516,9 @@
 	.id		= UCLASS_I2C,
 	.name		= "i2c",
 	.flags		= DM_UC_FLAG_SEQ_ALIAS,
-	.post_bind	= i2c_post_bind,
+#if CONFIG_IS_ENABLED(OF_CONTROL)
+	.post_bind	= dm_scan_fdt_dev,
+#endif
 	.post_probe	= i2c_post_probe,
 	.per_device_auto_alloc_size = sizeof(struct dm_i2c_bus),
 	.per_child_platdata_auto_alloc_size = sizeof(struct dm_i2c_chip),