[llvm] Fix Incorrect Tablegen Record for `S_CBRANCH_*_FORK` and `S_CBRANCH_JOIN` Instructions (PR #189205)

[Matt Arsenault via llvm-commits]

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@@ -878,6 +883,12 @@ def S_CBRANCH_G_FORK : SOP2_Pseudo <
   (ins SCSrc_b64:$src0, SCSrc_b64:$src1),
   "$src0, $src1"
 > {
+  let isBranch = 1;
+  let isTerminator = 1;
+  let isIndirectBranch = 1;
+  let Uses = [EXEC, MODE];
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arsenm wrote:

I don't see MODE as a documented use?

https://github.com/llvm/llvm-project/pull/189205