[clang] [llvm] [RISCV] Add TT-Ascalon-d8 processor (PR #115100)

[Camel Coder via cfe-commits]

camel-cdr wrote:

Ventana's Veyron V1 is called `veyron-v1` not `ventana-veyron-v1`, Qualcomm's oryon is `oryon-1`.
>From existing names, it seems like just `ascalon-d8` would be expected. The company prefixes seem to mostly be used for very short processor names: `apple-m1`, `spacemit-x60`, `sifive-x280`.

https://github.com/llvm/llvm-project/pull/115100