[wasm-simd] LoadTransform is always a SIMD operation

LoadTransform is always a SIMD operation (it always results in a v128),
so it should unconditionally set has_simd_.

Bug: chromium:1137583
Change-Id: I8496e787c89edec734f4bbfd16dd8b5995fab98a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2472638Reviewed-by: Bill Budge <bbudge@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70518}

src/compiler/wasm-compiler.cc

@@ -4016,9 +4016,7 @@ Node* WasmGraphBuilder::LoadTransform(wasm::ValueType type, MachineType memtype,
                                       Node* index, uint64_t offset,
                                       uint32_t alignment,
                                       wasm::WasmCodePosition position) {
-  if (memtype.representation() == MachineRepresentation::kSimd128) {
-    has_simd_ = true;
-  }
+  has_simd_ = true;
 
   Node* load;
   // {offset} is validated to be within uintptr_t range in {BoundsCheckMem}.