[llvm] [RISCV] Add mvendorid/marchid/mimpid to CPU definitions (PR #116202)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `flang-aarch64-latest-gcc` running on `linaro-flang-aarch64-latest-gcc` while building `llvm` at step 5 "build-unified-tree".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/130/builds/6550

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

```
Step 5 (build-unified-tree) failure: build (failure)
...
79.004 [6932/1/360] Building CXX object lib/IR/CMakeFiles/LLVMCore.dir/PassTimingInfo.cpp.o
79.101 [6931/1/361] Building CXX object lib/IR/CMakeFiles/LLVMCore.dir/PrintPasses.cpp.o
79.208 [6930/1/362] Building CXX object lib/IR/CMakeFiles/LLVMCore.dir/ProfDataUtils.cpp.o
79.393 [6929/1/363] Building CXX object lib/IR/CMakeFiles/LLVMCore.dir/SafepointIRVerifier.cpp.o
79.576 [6928/1/364] Building CXX object lib/IR/CMakeFiles/LLVMCore.dir/ProfileSummary.cpp.o
79.728 [6927/1/365] Building CXX object lib/IR/CMakeFiles/LLVMCore.dir/PseudoProbe.cpp.o
79.947 [6926/1/366] Building CXX object lib/IR/CMakeFiles/LLVMCore.dir/ReplaceConstant.cpp.o
80.070 [6925/1/367] Building CXX object lib/IR/CMakeFiles/LLVMCore.dir/Statepoint.cpp.o
80.196 [6924/1/368] Building CXX object lib/IR/CMakeFiles/LLVMCore.dir/StructuralHash.cpp.o
84.432 [6923/1/369] Building CXX object lib/IR/CMakeFiles/LLVMCore.dir/Type.cpp.o
FAILED: lib/IR/CMakeFiles/LLVMCore.dir/Type.cpp.o 
/usr/local/bin/c++ -DGTEST_HAS_RTTI=0 -DLLVM_EXPORTS -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/tcwg-buildbot/worker/flang-aarch64-latest-gcc/build/lib/IR -I/home/tcwg-buildbot/worker/flang-aarch64-latest-gcc/llvm-project/llvm/lib/IR -I/home/tcwg-buildbot/worker/flang-aarch64-latest-gcc/build/include -I/home/tcwg-buildbot/worker/flang-aarch64-latest-gcc/llvm-project/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-maybe-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 -std=c++17 -fPIC  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -MD -MT lib/IR/CMakeFiles/LLVMCore.dir/Type.cpp.o -MF lib/IR/CMakeFiles/LLVMCore.dir/Type.cpp.o.d -o lib/IR/CMakeFiles/LLVMCore.dir/Type.cpp.o -c /home/tcwg-buildbot/worker/flang-aarch64-latest-gcc/llvm-project/llvm/lib/IR/Type.cpp
In file included from ../llvm-project/llvm/lib/IR/Type.cpp:29:
../llvm-project/llvm/include/llvm/TargetParser/RISCVTargetParser.h:46:12: error: declaration of ‘llvm::RISCV::CPUModel llvm::RISCV::CPUInfo::CPUModel’ changes meaning of ‘CPUModel’ [-Wchanges-meaning]
   46 |   CPUModel CPUModel;
      |            ^~~~~~~~
../llvm-project/llvm/include/llvm/TargetParser/RISCVTargetParser.h:46:3: note: used here to mean ‘struct llvm::RISCV::CPUModel’
   46 |   CPUModel CPUModel;
      |   ^~~~~~~~
../llvm-project/llvm/include/llvm/TargetParser/RISCVTargetParser.h:35:8: note: declared here
   35 | struct CPUModel {
      |        ^~~~~~~~
ninja: build stopped: subcommand failed.

```

</details>

https://github.com/llvm/llvm-project/pull/116202