of: dma- fix build break for !CONFIG_OF

Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>

include/linux/of_dma.h

@@ -32,6 +32,7 @@ struct of_dma_filter_info {
 	dma_filter_fn	filter_fn;
 };
 
+#ifdef CONFIG_OF
 extern int of_dma_controller_register(struct device_node *np,
 		struct dma_chan *(*of_dma_xlate)
 		(struct of_phandle_args *, struct of_dma *),
@@ -41,5 +42,31 @@ extern struct dma_chan *of_dma_request_slave_channel(struct device_node *np,
 						     char *name);
 extern struct dma_chan *of_dma_simple_xlate(struct of_phandle_args *dma_spec,
 		struct of_dma *ofdma);
+#else
+static int of_dma_controller_register(struct device_node *np,
+		struct dma_chan *(*of_dma_xlate)
+		(struct of_phandle_args *, struct of_dma *),
+		void *data)
+{
+	return -ENODEV;
+}
+
+static void of_dma_controller_free(struct device_node *np)
+{
+}
+
+static struct dma_chan *of_dma_request_slave_channel(struct device_node *np,
+						     char *name)
+{
+	return NULL;
+}
+
+static struct dma_chan *of_dma_simple_xlate(struct of_phandle_args *dma_spec,
+		struct of_dma *ofdma)
+{
+	return NULL;
+}
+
+#endif
 
 #endif /* __LINUX_OF_DMA_H */