Update Yosys, disable block ram of width 2

SymbiFlow / yosys

SymbiFlow WIP changes for Yosys Open SYnthesis Suite

http://www.clifford.at/yosys/

ISC License

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Closed mkurc-ant closed 4 years ago

mkurc-ant commented 4 years ago

This PR incorporates the wip/disable_ramb18e_w2 which disables inference of block ram with data bus width of 2.

litghost commented 4 years ago

I'm not sure what happened, but the correct octopus merge looks like https://github.com/SymbiFlow/yosys/pull/51, with significantly fewer diffs. I also merged the outstanding master update from https://github.com/SymbiFlow/yosys/pull/48