watchdog: fix a small number of "watchog" typos in comments

All typos in comments, should not affect functionality.
Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

drivers/watchdog/booke_wdt.c

@@ -25,7 +25,7 @@
 /* If the kernel parameter wdt=1, the watchdog will be enabled at boot.
  * Also, the wdt_period sets the watchdog timer period timeout.
  * For E500 cpus the wdt_period sets which bit changing from 0->1 will
- * trigger a watchog timeout. This watchdog timeout will occur 3 times, the
+ * trigger a watchdog timeout. This watchdog timeout will occur 3 times, the
  * first time nothing will happen, the second time a watchdog exception will
  * occur, and the final time the board will reset.
  */

drivers/watchdog/via_wdt.c

@@ -30,7 +30,7 @@
 #define VIA_WDT_CONF_MMIO	0x02	/* 1: enable watchdog MMIO */
 
 /*
- * The MMIO region contains the watchog control register and the
+ * The MMIO region contains the watchdog control register and the
  * hardware timer counter.
  */
 #define VIA_WDT_MMIO_LEN	8	/* MMIO region length in bytes */
@@ -82,7 +82,7 @@ static inline void wdt_reset(void)
 /*
  * Timer tick: the timer will make sure that the watchdog timer hardware
  * is being reset in time. The conditions to do this are:
- *  1) the watchog timer has been started and /dev/watchdog is open
+ *  1) the watchdog timer has been started and /dev/watchdog is open
  *     and there is still time left before userspace should send the
  *     next heartbeat/ping. (note: the internal heartbeat is much smaller
  *     then the external/userspace heartbeat).