caif-driver: add HAS_DMA dependency
Fix this error on an s390 allyesconfig build: linux-2.6/drivers/net/caif/caif_spi.c:98: undefined reference to `dma_free_coherent' Cc: Sjur Braendeland <sjur.brandeland@stericsson.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -15,7 +15,7 @@ config CAIF_TTY
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config CAIF_SPI_SLAVE
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tristate "CAIF SPI transport driver for slave interface"
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depends on CAIF
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depends on CAIF && HAS_DMA
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default n
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---help---
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The CAIF Link layer SPI Protocol driver for Slave SPI interface.
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