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

[Sudharsan Veeravalli via llvm-commits]

https://github.com/svs-quic commented:

Please add entries in RISCVUsage.rst and ReleaseNotes.md.

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