mkimage: added ci20 platform support (MIPS CI20 Creator).

mkimage.sh.in

@@ -200,6 +200,10 @@ odroid-u2)
 usbarmory)
     dd if=${ROOTFSDIR}/boot/u-boot.imx of=${LOOPDEV} bs=512 seek=2 conv=fsync >/dev/null 2>&1
     ;;
+ci20)
+    dd if=${ROOTFSDIR}/boot/u-boot-spl.bin of=${LOOPDEV} obs=512 seek=1 >/dev/null 2>&1
+    dd if=${ROOTFSDIR}/boot/u-boot.img of=${LOOPDEV} obs=1K seek=14 >/dev/null 2>&1
+    ;;
 esac
 
 mountpoint -q ${ROOTFSDIR}/boot && umount ${ROOTFSDIR}/boot