[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-x86_64-sie-ubuntu-fast` running on `sie-linux-worker` while building `llvm` at step 5 "build-unified-tree".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/144/builds/35904

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

```
Step 5 (build-unified-tree) failure: build (failure)
...
0.023 [1508/8/6] Building CommentHTMLTagsProperties.inc...
0.023 [1508/7/7] Building CommentHTMLNamedCharacterReferences.inc...
0.024 [1508/6/8] Building CommentCommandInfo.inc...
0.024 [1508/5/9] Building CommentCommandList.inc...
0.026 [1505/4/10] Building StmtDataCollectors.inc...
0.026 [1505/3/11] Building BuiltinTemplates.inc...
0.037 [160/4/12] Generating VCSRevision.h
0.047 [160/3/13] Building Opcodes.inc...
0.104 [152/2/14] Building OpenCLBuiltins.inc...
1.110 [150/1/15] Building RISCVTargetParserDef.inc...
FAILED: include/llvm/TargetParser/RISCVTargetParserDef.inc /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/include/llvm/TargetParser/RISCVTargetParserDef.inc 
cd /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/include/llvm/TargetParser && /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/bin/llvm-min-tblgen -gen-riscv-target-def -I/home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/llvm-project/llvm/include/llvm/TargetParser -I/home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/llvm-project/llvm/lib/Target/RISCV -I/home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/include -I/home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/llvm-project/llvm/include /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/llvm-project/llvm/lib/Target/RISCV/RISCV.td --write-if-changed -o RISCVTargetParserDef.inc -d RISCVTargetParserDef.inc.d && /usr/bin/cmake/bin/cmake -E cmake_transform_depfile Ninja gccdepfile /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/llvm-project/llvm /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/llvm-project/llvm/include/llvm/TargetParser /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/include/llvm/TargetParser /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/include/llvm/TargetParser/RISCVTargetParserDef.inc.d /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/CMakeFiles/d/841f0ac268e72ca9fdf1bd0b9939a7f15c302ec16841f086da59860ad298d7c8.d
Included from /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/llvm-project/llvm/lib/Target/RISCV/RISCV.td:36:
Included from /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/llvm-project/llvm/lib/Target/RISCV/RISCVInstrInfo.td:2344:
Included from /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/llvm-project/llvm/lib/Target/RISCV/RISCVInstrInfoV.td:1842:
/home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/llvm-project/llvm/lib/Target/RISCV/RISCVInstrInfoZvfbf.td:39:19: error: Variable not defined: 'HasStdExtZvfbfmin'
let Predicates = [HasStdExtZvfbfmin] in {
                  ^
ninja: build stopped: subcommand failed.

```

</details>

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