Currently OMAP doesn't define a MAX_DMA_CHANNELS value, which leads to:
CC arch/arm/kernel/dma.o
arch/arm/kernel/dma.c:27:5: warning: "MAX_DMA_CHANNELS" is not defined
It seems like the sensible thing to do is to set this to 0 so this entire
API is just avoided, as everything is using the OMAP-specific one now
anyways.
#define __ASM_ARCH_DMA_H
#define MAX_DMA_ADDRESS 0xffffffff
+#define MAX_DMA_CHANNELS 0
/* Hardware registers for omap1 */
#define OMAP_DMA_BASE (0xfffed800)