[llvm] [NVPTX] Cleanup/Refactoring in NVPTX AsmPrinter and RegisterInfo (NFC) (PR #126800)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `polly-x86_64-linux-noassert` running on `polly-x86_64-gce1` while building `llvm` at step 5 "build".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/28/builds/6783

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

```
Step 5 (build) failure: 'ninja' (failure)
[1/122] Generating VCSRevision.h
[2/122] Generating VCSVersion.inc
[3/122] Building CXX object tools/llvm-config/CMakeFiles/llvm-config.dir/llvm-config.cpp.o
[4/122] Building CXX object lib/Object/CMakeFiles/LLVMObject.dir/IRSymtab.cpp.o
[5/122] Linking CXX static library lib/libLLVMObject.a
[6/122] Building CXX object lib/Target/NVPTX/CMakeFiles/LLVMNVPTXCodeGen.dir/NVPTXFrameLowering.cpp.o
[7/122] Building CXX object lib/Target/NVPTX/CMakeFiles/LLVMNVPTXCodeGen.dir/NVPTXAsmPrinter.cpp.o
FAILED: lib/Target/NVPTX/CMakeFiles/LLVMNVPTXCodeGen.dir/NVPTXAsmPrinter.cpp.o 
ccache /usr/bin/c++ -DGTEST_HAS_RTTI=0 -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/worker/buildbot-workers/polly-x86_64-gce1/rundir/llvm.obj/lib/Target/NVPTX -I/home/worker/buildbot-workers/polly-x86_64-gce1/rundir/llvm.src/llvm/lib/Target/NVPTX -I/home/worker/buildbot-workers/polly-x86_64-gce1/rundir/llvm.obj/include -I/home/worker/buildbot-workers/polly-x86_64-gce1/rundir/llvm.src/llvm/include -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -fno-lifetime-dse -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wno-missing-field-initializers -pedantic -Wno-long-long -Wimplicit-fallthrough -Wno-uninitialized -Wno-nonnull -Wno-class-memaccess -Wno-redundant-move -Wno-pessimizing-move -Wno-noexcept-type -Wdelete-non-virtual-dtor -Wsuggest-override -Wno-comment -Wno-misleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG -fvisibility=hidden  -fno-exceptions -funwind-tables -fno-rtti -std=c++17 -MD -MT lib/Target/NVPTX/CMakeFiles/LLVMNVPTXCodeGen.dir/NVPTXAsmPrinter.cpp.o -MF lib/Target/NVPTX/CMakeFiles/LLVMNVPTXCodeGen.dir/NVPTXAsmPrinter.cpp.o.d -o lib/Target/NVPTX/CMakeFiles/LLVMNVPTXCodeGen.dir/NVPTXAsmPrinter.cpp.o -c /home/worker/buildbot-workers/polly-x86_64-gce1/rundir/llvm.src/llvm/lib/Target/NVPTX/NVPTXAsmPrinter.cpp
/home/worker/buildbot-workers/polly-x86_64-gce1/rundir/llvm.src/llvm/lib/Target/NVPTX/NVPTXAsmPrinter.cpp: In member function ‘void llvm::NVPTXAsmPrinter::emitLinkageDirective(const llvm::GlobalValue*, llvm::raw_ostream&)’:
/home/worker/buildbot-workers/polly-x86_64-gce1/rundir/llvm.src/llvm/lib/Target/NVPTX/NVPTXAsmPrinter.cpp:917:54: error: ‘const class llvm::GlobalValue’ has no member named ‘getNameOrAsOperand’
  917 |       report_fatal_error("Symbol '" + llvm::Twine(V->getNameOrAsOperand()) +
      |                                                      ^~~~~~~~~~~~~~~~~~
[8/122] Building CXX object lib/Target/NVPTX/CMakeFiles/LLVMNVPTXCodeGen.dir/NVPTXInstrInfo.cpp.o
[9/122] Building CXX object lib/Target/NVPTX/CMakeFiles/LLVMNVPTXCodeGen.dir/NVPTXISelDAGToDAG.cpp.o
[10/122] Building CXX object lib/CodeGen/AsmPrinter/CMakeFiles/LLVMAsmPrinter.dir/AsmPrinter.cpp.o
[11/122] Building CXX object lib/Target/NVPTX/CMakeFiles/LLVMNVPTXCodeGen.dir/NVPTXISelLowering.cpp.o
[12/122] Building CXX object lib/LTO/CMakeFiles/LLVMLTO.dir/LTO.cpp.o
ninja: build stopped: subcommand failed.

```

</details>

https://github.com/llvm/llvm-project/pull/126800