ARM: OMAP5: Set fdt_high to enable booting with Device tree

While booting with dt blob, if fdt_high is not set to
0xffffffff, the dt blob gets relocated to a high ram address,
which the kernel is not able to use without HIGHMEM.

So set it to 0xffffffff to avoid the issue.
Acked-by: NNishanth Menon <nm@ti.com>
Signed-off-by: NSricharan R <r.sricharan@ti.com>
Tested-by: NNishanth Menon <nm@ti.com>

include/configs/omap5_common.h

@@ -143,6 +143,7 @@
 #define CONFIG_EXTRA_ENV_SETTINGS \
 	"loadaddr=0x82000000\0" \
 	"console=ttyO2,115200n8\0" \
+	"fdt_high=0xffffffff\0" \
 	"usbtty=cdc_acm\0" \
 	"vram=16M\0" \
 	"mmcdev=0\0" \