ARM: shmobile: Remove unused headers from hotplug.c

This file has no SoC-specific references in it, and
fortunately it is still independent of OF so there
is no real reason to drag in these headers.
Signed-off-by: NMagnus Damm <damm@opensource.se>
Signed-off-by: NSimon Horman <horms+renesas@verge.net.au>

arch/arm/mach-shmobile/hotplug.c

@@ -14,12 +14,8 @@
 #include <linux/smp.h>
 #include <linux/cpumask.h>
 #include <linux/delay.h>
-#include <linux/of.h>
 #include <mach/common.h>
-#include <mach/r8a7779.h>
-#include <mach/emev2.h>
 #include <asm/cacheflush.h>
-#include <asm/mach-types.h>
 
 static cpumask_t dead_cpus;