spi: Return -ENOSYS when system call is not available
Update spi_controller_dma_map_mem_op_data() to use -ENOSYS, which is the
correct error code for U-Boot.
Signed-off-by: NSimon Glass <sjg@chromium.org>
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Update spi_controller_dma_map_mem_op_data() to use -ENOSYS, which is the
correct error code for U-Boot.
Signed-off-by: NSimon Glass <sjg@chromium.org>