Comment # 19 on bug 66932 from Martin Andersson

I wasn't very clear in my #12 comment, but what I was trying to say it is
something fishy about "reg_block->asRegIndexBuf". It is defined in atombios.h
as:
ATOM_MEMORY_SETTING_DATA_BLOCK  asRegDataBuf[1];

But it is accessed well beyond just the first element and it is after the first
access that things start getting weird.