Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/drivers/pci/iova.c b/drivers/pci/iova.c
index 7914951..9606e59 100644
--- a/drivers/pci/iova.c
+++ b/drivers/pci/iova.c
@@ -391,7 +391,7 @@
 				break;
 	}
 
-	/* We are here either becasue this is the first reserver node
+	/* We are here either because this is the first reserver node
 	 * or need to insert remaining non overlap addr range
 	 */
 	iova = __insert_new_range(iovad, pfn_lo, pfn_hi);