watchdog: cleanup spaces before tabs

cleanup spaces before tabs in drivers/watchdog/

Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

diff --git a/drivers/watchdog/pnx4008_wdt.c b/drivers/watchdog/pnx4008_wdt.c
index bf5b97c..c7cf4cb 100644
--- a/drivers/watchdog/pnx4008_wdt.c
+++ b/drivers/watchdog/pnx4008_wdt.c
@@ -4,7 +4,7 @@
  * Watchdog driver for PNX4008 board
  *
  * Authors: Dmitry Chigirev <source@mvista.com>,
- * 	    Vitaly Wool <vitalywool@gmail.com>
+ *	    Vitaly Wool <vitalywool@gmail.com>
  * Based on sa1100 driver,
  * Copyright (C) 2000 Oleg Drokin <green@crimea.edu>
  *