spi_slave.c:fix DMA channel set to zero which might gets conflict with assert
close #2740
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@ -218,7 +218,7 @@ cleanup:
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free(spihost[host]);
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free(spihost[host]);
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spihost[host] = NULL;
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spihost[host] = NULL;
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spicommon_periph_free(host);
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spicommon_periph_free(host);
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spicommon_dma_chan_free(dma_chan);
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if (dma_chan != 0) spicommon_dma_chan_free(dma_chan);
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return ret;
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return ret;
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}
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}
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