I thought that could only be done by Constitutional Amendment? These are supposedly Constitutional cases, even though the complaint this week is that it isn't the Constitution which is principally being consulted (this lib majority of SIX justices can't find the results they want there).
Now - BECAUSE OF THAT - perhaps Congress COULD . . make an issue of restraining the Court on the basis that the Court itself no longer uses the Constitution as norm, and so is intruding into the Legislative power which the House, at least, might move to control. Could be interesting. Depends on how they go about it.
Here is a good summation of the power of Congress in regards to overruling the SCOTUS. Hope this helps to clarify:
http://www.prospect.org/web/page.ww?section=root&name=ViewPrint&articleId=5860