[lld] [lld][LoongArch] Relax R_LARCH_PCALA_HI20 and R_LARCH_PCALA_LO12 (PR #112696)

[Fangrui Song via llvm-commits]

https://github.com/MaskRay requested changes to this pull request.

Please don't land the patch. Non-trivial patches to lld/ELF require approval from maintainers.

https://github.com/llvm/llvm-project/pull/112696