linux-phytec-fsl

s390/dma: provide dma_cache_sync() function

Provide empty dma_cache_sync() function.

Acked-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>