config: Drop CONFIG_CONSOLE_DEV

This is not really a config. Rename it to avoid confusion.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Jagan Teki <jteki@openedev.com>
diff --git a/include/configs/embestmx6boards.h b/include/configs/embestmx6boards.h
index 2dc831d..97a912b 100644
--- a/include/configs/embestmx6boards.h
+++ b/include/configs/embestmx6boards.h
@@ -14,7 +14,7 @@
 #define __RIOTBOARD_CONFIG_H
 
 #define CONFIG_MXC_UART_BASE		UART2_BASE
-#define CONFIG_CONSOLE_DEV		"ttymxc1"
+#define CONSOLE_DEV		"ttymxc1"
 #define CONFIG_MMCROOT			"/dev/mmcblk1p2"
 
 #define PHYS_SDRAM_SIZE		(1u * 1024 * 1024 * 1024)