ARM: EXYNOS: Remove "linux/bug.h" from pmu.c

This patch removes unnecessary header file inclusion from pmu.c.
Signed-off-by: NPankaj Dubey <pankaj.dubey@samsung.com>
Reviewed-by: NTomasz Figa <t.figa@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

arch/arm/mach-exynos/pmu.c

@@ -11,7 +11,6 @@
 
 #include <linux/io.h>
 #include <linux/kernel.h>
-#include <linux/bug.h>
 
 #include "common.h"
 #include "regs-pmu.h"