Added writing DDR.bin to DDR partition during flo OTA

[Issue 9734870] Some devices are unstable with Elpida DDR RAM

The DDR.bin in fact are all zeros, it's meant to erase partition
DDR during each OTA update for DDR memory retraining.

Change-Id: Id23bf14344a33c437cbaf77f4fb35bf9e3663b98
1 file changed