Changeset 9182:c9ca95595667
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Cache: Split invalidateBlk up to seperate block vs. tags

This seperates the functionality to clear the state in a block into blk.hh and
the functionality to udpate the tag information into the tags.  This gets rid of
the case where calling invalidateBlk on an already-invalid block does something
different than calling it on a valid block, which was confusing.