[FIX][Relax] Update reverse_sequence dtype checks

Author: tqchen

src/relax/op/tensor/manipulate.cc

@@ -2103,14 +2103,15 @@ Type InferTypeReverseSequence(const Call& call, const BlockBuilder& ctx) {
         << "ReverseSequence requires seq_lengths to be 1-D. However, seq_lengths has ndim "
         << seq_lengths_ty->ndim;
   }
-  if (!seq_lengths_ty->dtype.is_void() && !seq_lengths_ty->dtype.is_int()) {
+  PrimType seq_lengths_dtype = seq_lengths_ty->dtype;
+  if (!seq_lengths_ty->IsUnknownDtype() && !seq_lengths_dtype.MatchesCode(DLDataTypeCode::kDLInt)) {
     TVM_FFI_VISIT_THROW(ValueError, call)
         << "ReverseSequence requires seq_lengths to have dtype int32 or int64. However, "
            "seq_lengths has dtype "
         << seq_lengths_ty->dtype;
   }
-  if (seq_lengths_ty->dtype.is_int() && seq_lengths_ty->dtype.bits() != 32 &&
-      seq_lengths_ty->dtype.bits() != 64) {
+  if (seq_lengths_dtype.MatchesCode(DLDataTypeCode::kDLInt) &&
+      seq_lengths_dtype->dtype.bits != 32 && seq_lengths_dtype->dtype.bits != 64) {
     TVM_FFI_VISIT_THROW(ValueError, call)
         << "ReverseSequence requires seq_lengths to have dtype int32 or int64. However, "
            "seq_lengths has dtype "