[llvm] [RISCV][Xqcili] Implement Load Immediate Support (PR #132496)

[Sudharsan Veeravalli via llvm-commits]

https://github.com/svs-quic approved this pull request.

LGTM but please wait for someone else to take a look as well.

https://github.com/llvm/llvm-project/pull/132496