[AVR32] Implement dma_mapping_error()
dma_map_single() never fails, so dma_mapping_error() simply returns 0.
Signed-off-by:
Haavard Skinnemoen <hskinnemoen@atmel.com>
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dma_map_single() never fails, so dma_mapping_error() simply returns 0.
Signed-off-by:
Haavard Skinnemoen <hskinnemoen@atmel.com>