arm:trats: loaduimage environment variable defied for TRATS target

Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>

include/configs/trats.h

@@ -144,6 +144,7 @@
 	"meminfo=crashkernel=32M@0x50000000\0" \
 	"nfsroot=/nfsroot/arm\0" \
 	"bootblock=" CONFIG_BOOTBLOCK "\0" \
+	"loaduimage=fatload mmc ${mmcdev}:${mmcbootpart} 0x40007FC0 uImage\0" \
 	"mmcdev=0\0" \
 	"mmcbootpart=2\0" \
 	"mmcrootpart=3\0" \