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/igbvf/netdev.c b/drivers/net/igbvf/netdev.c
index 6ccc32f..1d04ca6 100644
--- a/drivers/net/igbvf/netdev.c
+++ b/drivers/net/igbvf/netdev.c
@@ -2227,7 +2227,7 @@
 
 	/*
 	 * count reflects descriptors mapped, if 0 then mapping error
-	 * has occured and we need to rewind the descriptor queue
+	 * has occurred and we need to rewind the descriptor queue
 	 */
 	count = igbvf_tx_map_adv(adapter, tx_ring, skb, first);