[llvm] [NFC][RISCV] Move Zvfbf* relative stuffs to RISCVInstrInfoZvfbf.td (PR #159619)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-clang-aarch64-darwin` running on `doug-worker-5` while building `llvm` at step 5 "build-unified-tree".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/190/builds/27834

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 5 (build-unified-tree) failure: build (failure)
...
2.944 [5890/10/361] Building CXX object lib/DebugInfo/BTF/CMakeFiles/LLVMDebugInfoBTF.dir/BTFParser.cpp.o
2.948 [5889/10/362] Building CXX object utils/TableGen/CMakeFiles/llvm-tblgen.dir/AsmMatcherEmitter.cpp.o
2.951 [5888/10/363] Building CXX object utils/TableGen/CMakeFiles/llvm-tblgen.dir/CodeEmitterGen.cpp.o
2.953 [5887/10/364] Linking CXX static library lib/libLLVMRemarks.a
2.955 [5886/10/365] Building CXX object utils/TableGen/CMakeFiles/llvm-tblgen.dir/AsmWriterEmitter.cpp.o
2.958 [5885/10/366] Linking CXX static library lib/libLLVMDebugInfoBTF.a
2.963 [5884/10/367] Building CXX object utils/TableGen/CMakeFiles/llvm-tblgen.dir/CallingConvEmitter.cpp.o
2.964 [5883/10/368] Building CXX object utils/TableGen/CMakeFiles/llvm-tblgen.dir/CodeGenMapTable.cpp.o
2.967 [5882/10/369] Building CXX object utils/TableGen/CMakeFiles/llvm-tblgen.dir/CompressInstEmitter.cpp.o
2.969 [5881/10/370] Building RISCVTargetParserDef.inc...
FAILED: [code=1] include/llvm/TargetParser/RISCVTargetParserDef.inc /Users/buildbot/buildbot-root/aarch64-darwin/build/include/llvm/TargetParser/RISCVTargetParserDef.inc 
cd /Users/buildbot/buildbot-root/aarch64-darwin/build/include/llvm/TargetParser && /Users/buildbot/buildbot-root/aarch64-darwin/build/bin/llvm-min-tblgen -gen-riscv-target-def -I/Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/llvm/include/llvm/TargetParser -I/Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/llvm/lib/Target/RISCV -I/Users/buildbot/buildbot-root/aarch64-darwin/build/include -I/Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/llvm/include /Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/llvm/lib/Target/RISCV/RISCV.td --write-if-changed -o RISCVTargetParserDef.inc -d RISCVTargetParserDef.inc.d && /Applications/CMake.app/Contents/bin/cmake -E cmake_transform_depfile Ninja gccdepfile /Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/llvm /Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/llvm/include/llvm/TargetParser /Users/buildbot/buildbot-root/aarch64-darwin/build /Users/buildbot/buildbot-root/aarch64-darwin/build/include/llvm/TargetParser /Users/buildbot/buildbot-root/aarch64-darwin/build/include/llvm/TargetParser/RISCVTargetParserDef.inc.d /Users/buildbot/buildbot-root/aarch64-darwin/build/CMakeFiles/d/e310eff2e53abd36c396068919ccb2bb215345335aa85f3f3102a35a6cf0558a.d
Included from /Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/llvm/lib/Target/RISCV/RISCV.td:36:
Included from /Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/llvm/lib/Target/RISCV/RISCVInstrInfo.td:2344:
Included from /Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/llvm/lib/Target/RISCV/RISCVInstrInfoV.td:1842:
/Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/llvm/lib/Target/RISCV/RISCVInstrInfoZvfbf.td:39:19: error: Variable not defined: 'HasStdExtZvfbfmin'
let Predicates = [HasStdExtZvfbfmin] in {
                  ^
2.971 [5881/9/371] Building CXX object utils/TableGen/CMakeFiles/llvm-tblgen.dir/CTagsEmitter.cpp.o
2.975 [5881/8/372] Building CXX object utils/TableGen/CMakeFiles/llvm-tblgen.dir/DAGISelEmitter.cpp.o
2.977 [5881/7/373] Building CXX object utils/TableGen/CMakeFiles/llvm-tblgen.dir/DAGISelMatcherGen.cpp.o
2.978 [5881/6/374] Building CXX object utils/TableGen/CMakeFiles/llvm-tblgen.dir/DAGISelMatcherEmitter.cpp.o
2.980 [5881/5/375] Building CXX object utils/TableGen/CMakeFiles/llvm-tblgen.dir/DecoderEmitter.cpp.o
2.981 [5881/4/376] Building CXX object utils/TableGen/CMakeFiles/llvm-tblgen.dir/DAGISelMatcherOpt.cpp.o
2.983 [5881/3/377] Building CXX object utils/TableGen/CMakeFiles/llvm-tblgen.dir/DFAEmitter.cpp.o
2.983 [5881/2/378] Building CXX object utils/TableGen/CMakeFiles/llvm-tblgen.dir/DFAPacketizerEmitter.cpp.o
2.990 [5881/1/379] Building CXX object utils/TableGen/CMakeFiles/llvm-tblgen.dir/DisassemblerEmitter.cpp.o
ninja: build stopped: subcommand failed.

```

</details>

https://github.com/llvm/llvm-project/pull/159619