MIPS: Cleanup CallInterfaceDescriptor.

Port r22014 (234866c)

Original commit message:
Make CallInterfaceDescriptor work like CodeStubInterfaceDescriptor, owning it's
register and representation arrays. This also eliminates a host of TSAN warnings
for static arrays.

This CL depends on https://codereview.chromium.org/352583002 landing first
(a conceptual dependency at least).

BUG=
R=palfia@homejinni.com

Review URL: https://codereview.chromium.org/356773003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22023 ce2b1a6d-e550-0410-aec6-3dcde31c8c00