sh: fix up sh7786 dmaengine build.

The asm/dmaengine.h header is gone now, update accordingly.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

arch/sh/kernel/cpu/sh4a/setup-sh7786.c

@@ -21,10 +21,10 @@
 #include <linux/mm.h>
 #include <linux/dma-mapping.h>
 #include <linux/sh_timer.h>
+#include <linux/sh_dma.h>
 #include <linux/sh_intc.h>
 #include <cpu/dma-register.h>
 #include <asm/mmzone.h>
-#include <asm/dmaengine.h>
 
 static struct plat_sci_port scif0_platform_data = {
 	.mapbase	= 0xffea0000,