[coreboot-gerrit] Change in coreboot[master]: device/dram/ddr3: Drop unused MRS helpers

[Felix Held (Code Review)]

Felix Held has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/47343 )

Change subject: device/dram/ddr3: Drop unused MRS helpers
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Patch Set 1:

there's some useful stuff in there; I'd prefer replacing northbridge code that basically does the same with calls to these functions