[clang-tools-extra] [RISCV] Added definition of Ventana veyron-v1 processor. (PR #65535)

[Michael Maitland via cfe-commits]

michaelmaitland wrote:

> [Merge branch 'llvm:main' into mgudim_veyron_def](https://github.com/llvm/llvm-project/pull/65535/commits/454b41eea50a3583affffb5c29bffbd46bcd633b)

The [LLVM GitHub User Guide](https://llvm.org/docs//GitHub.html) recommends to rebase on main instead of merge main.

https://github.com/llvm/llvm-project/pull/65535