Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/drivers/watchdog/smsc37b787_wdt.c b/drivers/watchdog/smsc37b787_wdt.c
index df88cfa..e97b049 100644
--- a/drivers/watchdog/smsc37b787_wdt.c
+++ b/drivers/watchdog/smsc37b787_wdt.c
@@ -191,7 +191,7 @@
 static inline void wdt_timer_ctrl(unsigned char reg)
 {
 	/* -- Watchdog timer control --
-	 * Bit 0   Status Bit: 0 = Timer counting, 1 = Timeout occured
+	 * Bit 0   Status Bit: 0 = Timer counting, 1 = Timeout occurred
 	 * Bit 1   Power LED Toggle: 0 = Disable Toggle, 1 = Toggle at 1 Hz
 	 * Bit 2   Force Timeout: 1 = Forces WD timeout event (self-cleaning)
 	 * Bit 3   P20 Force Timeout enabled: