Mark uImage-dtb target as uncompressed to prevent U-Boot from decompressing the image. The embedded zImage is already compressed an is self-extracting.
Fix invalid path in Makefile
Fix build errors in old NAND driver
Downgrade NAND driver to the older one released 2014-13-06, because the newest (2014-06-18) doesn't work
Make MTD for G18REF the same as in Matricom's 1.1.6 firmware