watchdog: Fix a typo in Kconfig

s/thershold/threshold

Cc: Vijayakannan Ayyathurai <vijayakannan.ayyathurai@intel.com>
Signed-off-by: Wong Vee Khee <vee.khee.wong@linux.intel.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20210401033209.9929-1-vee.khee.wong@linux.intel.comSigned-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

drivers/watchdog/Kconfig

@@ -2120,7 +2120,7 @@ config KEEMBAY_WATCHDOG
 	 This option enable support for an In-secure watchdog timer driver for
 	 Intel Keem Bay SoC. This WDT has a 32 bit timer and decrements in every
 	 count unit. An interrupt will be triggered, when the count crosses
-	 the thershold configured in the register.
+	 the threshold configured in the register.
 
 	 To compile this driver as a module, choose M here: the
 	 module will be called keembay_wdt.