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

[Sudharsan Veeravalli via cfe-commits]

svs-quic wrote:

It looks like there are some conflicts. Please fix them before merging.

Also just noticed that you have been updating the same commit with the changes requested in the reviews. Please have them as separate commits in the future so that we can know what changed.

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