u-boot on h1940

I've published my u-boot fork here, it contains support for rx1950 and h1940 (there was report that h1940 version works, but I didn't test it by myself). You can build and test them from haret - only usb device and nand work for now, but sd/mmc should work aswell, just need some testing :))

Later this week I'll try to flash u-boot to h1940, just need to solder jtag to its board :)

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