[RISCV][NFC] IsEligibleForTailCallOptimization -> isEligibleForTailCallOptimization

Also clang-format the modified hunks.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@354584 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed