backports: wrap dma_set_mask_and_coherent in LINUX_BACKPORT()

To avoid conflicts with any distribution kernel wrap
dma_set_mask_and_coherent with LINUX_BACKPORT().

Signed-off-by: Stefan Assmann <sassmann@kpanic.de>
Signed-off-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>
1 file changed