arm64: define DMA_ERROR_CODE

Signed-off-by: NStefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: NCatalin Marinas <catalin.marinas@arm.com>
CC: will.deacon@arm.com

Changes in v8:
- cast to dma_addr_t before returning.

arch/arm64/include/asm/dma-mapping.h

@@ -25,6 +25,7 @@
 
 #define ARCH_HAS_DMA_GET_REQUIRED_MASK
 
+#define DMA_ERROR_CODE	(~(dma_addr_t)0)
 extern struct dma_map_ops *dma_ops;
 
 static inline struct dma_map_ops *get_dma_ops(struct device *dev)