[lldb] [llvm] [lldb][Process/FreeBSD] Add riscv64 support (PR #180549)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp,h -- lldb/source/Plugins/Process/FreeBSD/NativeRegisterContextFreeBSD_riscv64.cpp lldb/source/Plugins/Process/FreeBSD/NativeRegisterContextFreeBSD_riscv64.h lldb/source/Plugins/Process/elf-core/ThreadElfCore.cpp --diff_from_common_commit
``````````

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in a stack if you are using a stacked PR workflow. You can limit the results by
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``````````diff
diff --git a/lldb/source/Plugins/Process/FreeBSD/NativeRegisterContextFreeBSD_riscv64.cpp b/lldb/source/Plugins/Process/FreeBSD/NativeRegisterContextFreeBSD_riscv64.cpp
index 36f08a80d..e9c5c55e3 100644
--- a/lldb/source/Plugins/Process/FreeBSD/NativeRegisterContextFreeBSD_riscv64.cpp
+++ b/lldb/source/Plugins/Process/FreeBSD/NativeRegisterContextFreeBSD_riscv64.cpp
@@ -456,7 +456,8 @@ Status NativeRegisterContextFreeBSD_riscv64::WriteRegister(
     return WriteFPR();
   }
 
-  return Status::FromErrorStringWithFormat("unsupported register type: %u", reg);
+  return Status::FromErrorStringWithFormat("unsupported register type: %u",
+                                           reg);
 }
 
 Status NativeRegisterContextFreeBSD_riscv64::ReadAllRegisterValues(
@@ -474,7 +475,8 @@ Status NativeRegisterContextFreeBSD_riscv64::ReadAllRegisterValues(
                             sizeof(RegisterInfoPOSIX_riscv64::FPR);
   data_sp = std::make_shared<DataBufferHeap>(total_size, 0);
   if (!data_sp || !data_sp->GetBytes())
-    return Status::FromErrorString("failed to allocate data buffer for POSIX-layout register data");
+    return Status::FromErrorString(
+        "failed to allocate data buffer for POSIX-layout register data");
 
   // Get pointers to GPR and FPR sections of buffer
   auto *gpr_dst =

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https://github.com/llvm/llvm-project/pull/180549