[mlir][PDL] Use explicit loop over llvm::find to fix MSVC breakage

Author: River707

mlir/lib/Rewrite/ByteCode.cpp

@@ -769,8 +769,10 @@ class ByteCodeExecutor {
 
     // Check to see if the attribute value is within the case list. Jump to
     // the correct successor index based on the result.
-    auto it = llvm::find(cases, value);
-    selectJump(it == cases.end() ? size_t(0) : ((it - cases.begin()) + 1));
+    for (auto it = cases.begin(), e = cases.end(); it != e; ++it)
+      if (*it == value)
+        return selectJump(size_t((it - cases.begin()) + 1));
+    selectJump(size_t(0));
   }
 
   /// Internal implementation of reading various data types from the bytecode