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

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u4f3 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.

You're right. Maybe I should try not to use `git commit --amend` next time.

Rebased to main and solve those conflicts. Hope I'm doing things right.

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