Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 7785169..3be881e 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -888,7 +888,7 @@
 	/*
 	 * Currently put the group at the end. Later implement something
 	 * so that groups get lesser vtime based on their weights, so that
-	 * if group does not loose all if it was not continously backlogged.
+	 * if group does not loose all if it was not continuously backlogged.
 	 */
 	n = rb_last(&st->rb);
 	if (n) {