ARM: EXYNOS: Remove file path from comment section

Many files under "arm/mach-exynos" are having file path in file
comment section which is invalid now.
So for better code maintainability let's remove them.
Signed-off-by: Pankaj Dubey <pankaj.dubey@samsung.com>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

arch/arm/mach-exynos/headsmp.S

 /*
- *  linux/arch/arm/mach-exynos4/headsmp.S
  *
  *  Cloned from linux/arch/arm/mach-realview/headsmp.S
  *

arch/arm/mach-exynos/hotplug.c

-/* linux arch/arm/mach-exynos4/hotplug.c
- *
+/*
  *  Cloned from linux/arch/arm/mach-realview/hotplug.c
  *
  *  Copyright (C) 2002 ARM Ltd.

arch/arm/mach-exynos/include/mach/map.h

-/* linux/arch/arm/mach-exynos/include/mach/map.h
- *
+/*
  * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
  *		http://www.samsung.com/
  *

arch/arm/mach-exynos/include/mach/memory.h

-/* linux/arch/arm/mach-exynos4/include/mach/memory.h
- *
+/*
  * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
  *		http://www.samsung.com
  *

arch/arm/mach-exynos/platsmp.c

-/* linux/arch/arm/mach-exynos4/platsmp.c
- *
+ /*
  * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
  *		http://www.samsung.com
  *