[clang] [llvm] [RISCV] Add Qualcomn uC Xqcili (load large immediates) extension (PR #130012)

[Sam Elliott via llvm-commits]

https://github.com/lenary approved this pull request.

LGTM.

Thank you for doing this PR for Xqcili support, it's great to see interest in this from the RISC-V community beyond Qualcomm. In future, it would be great to coordinate on what you are planning to upstream, as we (Qualcomm) have downstream implementations of the extensions which we are in the process of upstreaming, and we would like to avoid duplicated work in this area.

https://github.com/llvm/llvm-project/pull/130012