fdt: remove fdtdec_get_alias_node() function

The fdt_path_offset() checks an alias too.

fdtdec_get_alias_node(blob, "foo") is equivalent to
fdt_path_offset(blob, "foo").

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/serial/serial-uclass.c b/drivers/serial/serial-uclass.c
index b09053f..d1b5777 100644
--- a/drivers/serial/serial-uclass.c
+++ b/drivers/serial/serial-uclass.c
@@ -39,7 +39,7 @@
 	/* Check for a chosen console */
 	node = fdtdec_get_chosen_node(gd->fdt_blob, "stdout-path");
 	if (node < 0)
-		node = fdtdec_get_alias_node(gd->fdt_blob, "console");
+		node = fdt_path_offset(gd->fdt_blob, "console");
 	if (!uclass_get_device_by_of_offset(UCLASS_SERIAL, node, &dev)) {
 		gd->cur_serial_dev = dev;
 		return;