[llvm] AMDGPU/GlobalISel: Fix tablegen definition for G_AMDGPU_LOAD_D16 (PR #158039)

[Matt Arsenault via llvm-commits]

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@@ -4404,7 +4404,7 @@ def G_AMDGPU_TBUFFER_LOAD_FORMAT_D16 : TBufferLoadGenericInstruction;
 
 class D16LoadGenericInstruction : AMDGPUGenericInstruction {
   let OutOperandList = (outs type0:$dst);
-  let InOperandList = (ins ptype1:$addr);
+  let InOperandList = (ins ptype1:$addr, type0:$src);
   let hasSideEffects = 0;
   let mayLoad = 1;
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arsenm wrote:

Should this also have a Constraints to tie the operands? 

https://github.com/llvm/llvm-project/pull/158039