[MLIR][ROCDL] Fix accessedOperands for Rocdl_RawPtrBufferLoadOp (#127983)

`getAccessedOperands` should return all accessed pointer operands. In
the case for BufferLoads this is the source buffer and not the result.

Author: AlexAUT

mlir/include/mlir/Dialect/LLVMIR/ROCDLOps.td

@@ -470,7 +470,7 @@ def ROCDL_RawPtrBufferLoadOp :
   let assemblyFormat = "operands attr-dict `:` type($res)";
   let extraClassDefinition = [{
     ::llvm::SmallVector<::mlir::Value> $cppClass::getAccessedOperands() {
-      return {getRes()};
+      return {getRsrc()};
     }
   }];
 }