Remove USE_CACHE support, since we only need MC support.

BUG=6051742

This change also removes the legacy bcc_cache.h header by moving any relevant
defines still there to bcc_mccache.h. These types/values are now renamed to
generally use "MCO" instead of "OBCC".

Change-Id: I6c611bd296c0335cacd82025933f36eb55bff72f
17 files changed