[MCSched] Bind PFM Counters to the CPUs instead of the SchedModel.

Summary:
The pfm counters are now in the ExegesisTarget rather than the
MCSchedModel (PR39165).

This also compresses the pfm counter tables (PR37068).

Reviewers: RKSimon, gchatelet

Subscribers: mgrang, llvm-commits

Differential Revision: https://reviews.llvm.org/D52932

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@345243 91177308-0d34-0410-b5e6-96231b3b80d8
25 files changed