[PATCH] caif-driver: add HAS_DMA dependency

[Heiko Carstens]

From: Heiko Carstens <heiko.carstens@xxxxxxxxxx>

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@xxxxxxxxxxxxxx>
Signed-off-by: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
---
 drivers/net/caif/Kconfig |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/caif/Kconfig
+++ b/drivers/net/caif/Kconfig
@@ -15,7 +15,7 @@ config CAIF_TTY
 
 config CAIF_SPI_SLAVE
 	tristate "CAIF SPI transport driver for slave interface"
-	depends on CAIF
+	depends on CAIF && HAS_DMA
 	default n
 	---help---
 	The CAIF Link layer SPI Protocol driver for Slave SPI interface.
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