liblcd: Add missing header

lcd-domains/include/liblcd/dma-mapping.h

+
+
+#define _dma_map_single(d, a, s, r) _dma_map_single_attrs(d, a, s, r, 0)
+
+static inline dma_addr_t _dma_map_single_attrs(struct device *dev, void *ptr,
+					      size_t size,
+					      enum dma_data_direction dir,
+					      unsigned long attrs)
+{
+	struct dma_map_ops *ops = get_dma_ops(dev);
+	dma_addr_t addr;
+
+	kmemcheck_mark_initialized(ptr, size);
+	BUG_ON(!valid_dma_direction(dir));
+	addr = ops->map_page(dev, virt_to_page(ptr),
+			     offset_in_page(ptr), size,
+			     dir, attrs);
+	debug_dma_map_page(dev, virt_to_page(ptr),
+			   offset_in_page(ptr), size,
+			   dir, addr, true);
+	return addr;
+}