[mips] Fix floating point branch, comparison, and conditional move instructions
to have register FCC0 (the first floating point condition code register) in
their Uses/Defs list.

No intended functionality change.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187233 91177308-0d34-0410-b5e6-96231b3b80d8
[mips] Increase the number of floating point condition code registers to eight.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187234 91177308-0d34-0410-b5e6-96231b3b80d8