csky: don't select DMA_NONCOHERENT_OPS

This option is gone past Linux 4.19.
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Acked-by: NGuo Ren <ren_guo@c-sky.com>

arch/csky/Kconfig

@@ -8,7 +8,6 @@ config CSKY
 	select CLKSRC_MMIO
 	select CLKSRC_OF
 	select DMA_DIRECT_OPS
-	select DMA_NONCOHERENT_OPS
 	select DMA_REMAP
 	select IRQ_DOMAIN
 	select HANDLE_DOMAIN_IRQ