Only include linux/sched.h once in arch/arm/mach-bcmring/dma.c

There's no need to include the header twice.
Signed-off-by: Jesper Juhl <jj@chaosbits.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

arch/arm/mach-bcmring/dma.c

@@ -36,7 +36,6 @@
 #include <linux/mm.h>
 #include <linux/pfn.h>
 #include <linux/atomic.h>
-#include <linux/sched.h>
 #include <mach/dma.h>
 
 /* I don't quite understand why dc4 fails when this is set to 1 and DMA is enabled */