pwm: pxa: remove unnecessary space before tabs

Remove unnecessary space before tabs in order to fix the following
checkpatch warning.

  WARNING: please, no space before tabs
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>

drivers/pwm/pwm-pxa.c

@@ -8,7 +8,7 @@
  * published by the Free Software Foundation.
  *
  * 2008-02-13	initial version
- * 		eric miao <eric.miao@marvell.com>
+ *		eric miao <eric.miao@marvell.com>
  */
 
 #include <linux/module.h>