[mlir][nvgpu] Allow TMA's last dim to be non-128B without swizzling (llvm#81499)

Allow TMA's last dimension to be non-128B when swizzling mode is not
set.

Test `tma_load_64x8_8x128_noswizzle.mlir` is failing due to the
verifier. This PR will fix that

Author: grypp

mlir/lib/Dialect/NVGPU/IR/NVGPUDialect.cpp

@@ -362,7 +362,8 @@ std::optional<InFlightDiagnostic> verifyTmaDescriptorWithMemref(
                              << kMaxTMADimension << " but it is " << dim;
     }
   }
-  if (descMemref.getRank() > 1) {
+  if (descMemref.getRank() > 1 &&
+      descType.getSwizzle() != TensorMapSwizzleKind::SWIZZLE_NONE) {
     unsigned lastDimensionByte =
         descMemref.getElementTypeBitWidth() * descMemref.getShape().back() / 8;
     if (lastDimensionByte != kMaxTMALastdimByte)