mfd: 88pm860x-i2c: Repair 'space before tab' warning

Fixes checkpatch warning:

    WARNING: please, no space before tabs
    #5: FILE: drivers/mfd/88pm860x-i2c.c:5:
    + * ^IHaojian Zhuang <haojian.zhuang@marvell.com>$
Signed-off-by: Lee Jones <lee.jones@linaro.org>

drivers/mfd/88pm860x-i2c.c

@@ -2,7 +2,8 @@
  * I2C driver for Marvell 88PM860x
  *
  * Copyright (C) 2009 Marvell International Ltd.
- * 	Haojian Zhuang <haojian.zhuang@marvell.com>
+ *
+ * Author: Haojian Zhuang <haojian.zhuang@marvell.com>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as