board: nuvoton: update console environment variable

If CONFIG_SYS_SKIP_UART_INIT is enabled, calculate the
current baud rate and update the "console" environment
variable.

Signed-off-by: Jim Liu <JJLIU0@nuvoton.com>
diff --git a/board/nuvoton/poleg_evb/poleg_evb.c b/board/nuvoton/poleg_evb/poleg_evb.c
index 2052af6..7421911 100644
--- a/board/nuvoton/poleg_evb/poleg_evb.c
+++ b/board/nuvoton/poleg_evb/poleg_evb.c
@@ -10,6 +10,7 @@
 #include <asm/io.h>
 #include <asm/arch/gcr.h>
 #include <asm/mach-types.h>
+#include "../common/uart.h"
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -53,3 +54,10 @@
 
 	return 0;
 }
+
+int last_stage_init(void)
+{
+	board_set_console();
+
+	return 0;
+}