Revert "arm: config: fix default console only to specify the device"

This reverts commit 232ed3ca534708527a9515c7c41bc3542949525c.

In exynos boards, ${console} is used to set bootargs but it sets
without "console=", so CONFIG_DEFAULT_CONSOLE for these boards is
designated with "console=" but it is removed. So revert the commit.

References for using ${console} in
   board/samsung/common/bootscripts/autoboot.cmd
   board/samsung/common/bootscripts/bootzimg.cmd

Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
diff --git a/include/configs/trats.h b/include/configs/trats.h
index 223fce4..af8e8ce 100644
--- a/include/configs/trats.h
+++ b/include/configs/trats.h
@@ -36,7 +36,7 @@
 #define CONFIG_MACH_TYPE		MACH_TYPE_TRATS
 
 #define CONFIG_BOOTCOMMAND		"run autoboot"
-#define CONFIG_DEFAULT_CONSOLE		"ttySAC2,115200n8"
+#define CONFIG_DEFAULT_CONSOLE		"console=ttySAC2,115200n8\0"
 
 #define CONFIG_SYS_INIT_SP_ADDR	(CONFIG_SYS_LOAD_ADDR \
 					- GENERATED_GBL_DATA_SIZE)
@@ -120,7 +120,7 @@
 	"mmcoops=mmc read 0 0x40000000 0x40 8; md 0x40000000 0x400\0" \
 	"verify=n\0" \
 	"rootfstype=ext4\0" \
-	"console=" CONFIG_DEFAULT_CONSOLE "\0" \
+	"console=" CONFIG_DEFAULT_CONSOLE \
 	"meminfo=crashkernel=32M@0x50000000\0" \
 	"nfsroot=/nfsroot/arm\0" \
 	"bootblock=" CONFIG_BOOTBLOCK "\0" \