cuda : add check GGML_OP_SUM

Author: ggerganov

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

@@ -3645,9 +3645,10 @@ static bool ggml_backend_cuda_device_supports_op(ggml_backend_dev_t dev, const g
         case GGML_OP_CONV_2D_DW:
         case GGML_OP_CONV_TRANSPOSE_2D:
         case GGML_OP_POOL_2D:
-        case GGML_OP_SUM:
         case GGML_OP_ACC:
             return true;
+        case GGML_OP_SUM:
+            return ggml_is_contiguous_rows(op->src[0]);
         case GGML_OP_ARGSORT:
             // TODO: Support arbitrary column width
             return op->src[0]->ne[0] <= 1024;