[llvm] [JITLink][LoongArch] Support large code model (PR #155566)

[Lu Weining via llvm-commits]

================
@@ -170,6 +181,16 @@ enum EdgeKind_loongarch : Edge::Kind {
   ///
   PageOffset12,
 
+  /// The 12-bit high part of the 64-bit page delta.
+  ///
+  /// Fixup expression:
+  ///   Fixup <- getLoongArchPageDelta(Target + Addend, FixupAddress, Kind)
----------------
SixWeining wrote:

```suggestion
  ///   Fixup <- getLoongArchPageDelta(Target + Addend, Fixup, Kind)[63:52] : int12
```

https://github.com/llvm/llvm-project/pull/155566