[llvm] ARM: Move gnu half convert calling conv config into tablegen (PR #153394)

[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/32780

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

```
Step 5 (build-unified-tree) failure: build (failure)
...
0.019 [1644/12/4] Building AbstractBasicReader.inc...
0.019 [1644/11/5] Building AbstractBasicWriter.inc...
0.019 [1644/10/6] Building CommentHTMLTags.inc...
0.020 [1644/9/7] Building CommentHTMLTagsProperties.inc...
0.020 [1644/8/8] Building CommentHTMLNamedCharacterReferences.inc...
0.020 [1644/7/9] Building CommentCommandInfo.inc...
0.020 [1644/6/10] Building CommentCommandList.inc...
0.022 [1641/5/11] Building StmtDataCollectors.inc...
0.022 [1641/4/12] Building BuiltinTemplates.inc...
0.031 [309/3/13] Building RuntimeLibcalls.inc...
FAILED: include/llvm/IR/RuntimeLibcalls.inc /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/include/llvm/IR/RuntimeLibcalls.inc 
cd /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/include/llvm/IR && /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/bin/llvm-min-tblgen -gen-runtime-libcalls -I/home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/llvm-project/llvm/include/llvm/IR -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/include/llvm/IR/RuntimeLibcalls.td --write-if-changed -o RuntimeLibcalls.inc -d RuntimeLibcalls.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/IR /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/IR /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/include/llvm/IR/RuntimeLibcalls.inc.d /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/CMakeFiles/d/b986d43b1d08a8f8423e3166773ea07a45021fb4ddd3eb5f0369aa3b158f34dc.d
/home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/llvm-project/llvm/include/llvm/IR/RuntimeLibcalls.td:1505:5: error: def already exists: GNUEABIHalfConvertCalls
def GNUEABIHalfConvertCalls :
    ^
/home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/llvm-project/llvm/include/llvm/IR/RuntimeLibcalls.td:1485:5: note: location of previous definition
def GNUEABIHalfConvertCalls :
    ^
0.031 [309/2/14] Generating VCSRevision.h
0.057 [309/1/15] Linking CXX executable bin/llvm-config
ninja: build stopped: subcommand failed.

```

</details>

https://github.com/llvm/llvm-project/pull/153394