Enable GDN also for prefill, move TODO for chunked_GDN

ggml/src/ggml-cuda/gated_delta_net.cu

@@ -145,7 +145,7 @@ static void launch_gated_delta_net(
         int64_t sb1,   int64_t sb2, int64_t sb3,
         int64_t neqk1, int64_t rq3,
         float scale, cudaStream_t stream) {
-
+    //TODO: Add chunked kernel for even faster pre-fill
     constexpr uint32_t warp_size = ggml_cuda_get_physical_warp_size();
     const int num_warps = 4;
     dim3      grid_dims(H, n_seqs, (S_v + num_warps - 1) / num_warps);

ggml/src/ggml-cuda/ggml-cuda.cu

@@ -5001,7 +5001,7 @@ static bool ggml_backend_cuda_device_supports_op(ggml_backend_dev_t dev, const g
 #else
             // KDA is faster using the AR kernel even when n_tokens >= 512
             //TODO: Add chunked kernel
-            return op->src[0]->ne[2] == 1 || op->src[3]->ne[0] == op->src[2]->ne[0];
+            return true;
 #endif // GGML_USE_MUSA
         case GGML_OP_FLASH_ATTN_EXT:
             return ggml_cuda_flash_attn_ext_supported(dev_ctx->device, op);