dma-buf: dma-heap: Provide accessor to get heap name

REFERENCE:
https://git.seco.com/edgehog/bsp/rockchip/linux-seco-rk/-/commit/e09764eb7da7fe2c5d52153c97aa262c217fb9a4

drivers/dma-buf/dma-heap.c

@@ -257,6 +257,18 @@ struct device *dma_heap_get_dev(struct dma_heap *heap)
 	return heap->heap_dev;
 }
 
+/**
+ * dma_heap_get_name() - get heap name
+ * @heap: DMA-Heap to retrieve private data for
+ *
+ * Returns:
+ * The char* for the heap name.
+ */
+const char *dma_heap_get_name(struct dma_heap *heap)
+{
+	return heap->name;
+}
+
 struct dma_heap *dma_heap_add(const struct dma_heap_export_info *exp_info)
 {
 	struct dma_heap *heap, *h, *err_ret;

include/linux/dma-heap.h

@@ -59,6 +59,15 @@ void *dma_heap_get_drvdata(struct dma_heap *heap);
  */
 struct device *dma_heap_get_dev(struct dma_heap *heap);
 
+/**
+ * dma_heap_get_name() - get heap name
+ * @heap: DMA-Heap to retrieve private data for
+ *
+ * Returns:
+ * The char* for the heap name.
+ */
+const char *dma_heap_get_name(struct dma_heap *heap);
+
 /**
  * dma_heap_add - adds a heap to dmabuf heaps
  * @exp_info:		information needed to register this heap