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/sch311x_wdt.c b/drivers/watchdog/sch311x_wdt.c
index b61ab1c..c7cf4b0 100644
--- a/drivers/watchdog/sch311x_wdt.c
+++ b/drivers/watchdog/sch311x_wdt.c
@@ -201,7 +201,7 @@
 	spin_lock(&sch311x_wdt_data.io_lock);
 
 	/* -- 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   Reserved
 	 * Bit 2   Force Timeout: 1 = Forces WD timeout event (self-cleaning)
 	 * Bit 3   P20 Force Timeout enabled: