[DRAFT] Update MBQ regmap to handle more sizes and defers

[charleskeepax]

Add support to the existing MBQ regmap for 8-bit and 32-bit reads, as well SDCA style deferred reads that require retrying once the device side has had a chance to get the result ready. Probably makes more sense to send this directly upstream rather than merging through the SOF repo, but thought I would push a version here so you guys can have a chance to express any strong opinions before we get upstream involved.