davinci: ea20: the console is always set to the serial line

Do not allow to overwrite it when video is enabled.

Signed-off-by: Bastian Ruppert <Bastian.Ruppert@Sewerin.de>
CC: Tom Rini <trini@ti.com>
Acked-by: Stefano Babic <sbabic@denx.de>
diff --git a/board/davinci/ea20/ea20.c b/board/davinci/ea20/ea20.c
index 69307e4..0edd910 100644
--- a/board/davinci/ea20/ea20.c
+++ b/board/davinci/ea20/ea20.c
@@ -254,6 +254,15 @@
 	return 0;
 }
 
+/*
+ * Do not overwrite the console
+ * Use always serial for U-Boot console
+ */
+int overwrite_console(void)
+{
+	return 1;
+}
+
 int board_init(void)
 {
 	/* arch number of the board */
@@ -281,8 +290,6 @@
 	/* Set HALTEN to high */
 	gpio_direction_output(134, 1);
 
-	setenv("stdout", "serial");
-
 	/* Set fixed contrast settings for LCD via I2C potentiometer */
 	buf[0] = 0x00;
 	buf[1] = 0xd7;