Checking in a new config and patches for DDR setup
add DDR calibration routine to dram_init().

Note that you *must* have DEBUG on at the moment for it to work
due to a timing quirk in the calibration routine.
commit DDR3 tuning improvments. works now with 2-rank and 1-rank
*non-micron* memory.
start.S: Remove LED setup code

It was a hack, and is platform-specific.
novena-config: Remove excess config commands

We need to shrink U-Boot, so strip out unnecessary commands.
Merge branch 'ddrsetup' of github.com:sutajiokousagi/u-boot-imx6 into ddrsetup
ddr: Finalize DDR working
u-boot.lds: Add Novena memory map

This places .bss in DDR, to be initialized after DDR is brought up.
add SPD readout, and calibration/tuning based on parameters

greatly improves compatibility, should have solid performance with
most 2-rank dimms. Tested with Crucial, Kingston, and a few other
generics. Some oddball DIMMs are still incompatible, such as one
from Corsair and a very strange one from Samsung.