nb/intel/sandybridge/raminit: add additional fallbacks

Hardware / Coreboot - Patrick Rudolph [das-labor.org] - 4 May 2016 12:58 UTC

Add the following fallbacks:
- Try decreasing clock frequency. In case of DDR1600 the next possible value of DDR1333 is being used.
- Try decreasing clock frequency. In case of DDR1333 the next possible value of DDR1066 is being used.
- Disable failing channel. The system may be able to boot with a single channel enabled.

The fallbacks are untested.

Change-Id: I3be7034ad25312b3ebf47a54f335a3893f8d7cc1

2ccb74b nb/intel/sandybridge/raminit: add additional fallbacks
src/northbridge/intel/sandybridge/raminit.c | 44 +++++++++++++++++++++++++++
1 file changed, 44 insertions(+)

Upstream: review.coreboot.org

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