[turbofan] add RegisterConfiguration to decouple arch specific register layouts from compiler

R=bmeurer@chromium.org

BUG=

Review URL: https://codereview.chromium.org/694313002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25097 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Actually also advance the iterator in StorePropertyWithInterceptor

BUG=v8:3636
LOG=n
R=ishell@chromium.org

Review URL: https://codereview.chromium.org/702523002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25098 ce2b1a6d-e550-0410-aec6-3dcde31c8c00