[X86][BtVer2] Add a 'J' prefix to the PRF/RCU defs. NFC

This is to keep the Jaguar model's naming convention. Processor resources all
have a 'J' prefix in the BtVer2 scheduling model.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@332851 91177308-0d34-0410-b5e6-96231b3b80d8
10 files changed