Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/drivers/net/ethoc.c b/drivers/net/ethoc.c
index db0290f..a83dd31 100644
--- a/drivers/net/ethoc.c
+++ b/drivers/net/ethoc.c
@@ -542,7 +542,7 @@
 
 	/* Figure out what triggered the interrupt...
 	 * The tricky bit here is that the interrupt source bits get
-	 * set in INT_SOURCE for an event irregardless of whether that
+	 * set in INT_SOURCE for an event regardless of whether that
 	 * event is masked or not.  Thus, in order to figure out what
 	 * triggered the interrupt, we need to remove the sources
 	 * for all events that are currently masked.  This behaviour