DaVinci: remove unneeded #include's

There have accumulated quite a lot of them after the code reorganizations...

In several cases I had to replace #include <linux/dma-mapping.h> which wasn't
needed directly but happened to #include <linux/err.h> which was needed.

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

arch/arm/mach-davinci/dm644x.c

@@ -8,7 +8,6 @@
  * is licensed "as is" without any warranty of any kind, whether express
  * or implied.
  */
-#include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/clk.h>
 #include <linux/serial_8250.h>
@@ -18,7 +17,6 @@
 #include <asm/mach/map.h>
 
 #include <mach/dm644x.h>
-#include <mach/clock.h>
 #include <mach/cputype.h>
 #include <mach/edma.h>
 #include <mach/irqs.h>