trivial: fix typo "to to" in multiple files

Signed-off-by: Anand Gadiyar <gadiyar@ti.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/net/sched/sch_hfsc.c b/net/sched/sch_hfsc.c
index 375d64c..2c5c76b 100644
--- a/net/sched/sch_hfsc.c
+++ b/net/sched/sch_hfsc.c
@@ -77,7 +77,7 @@
  *   The service curve parameters are converted to the internal
  *   representation. The slope values are scaled to avoid overflow.
  *   the inverse slope values as well as the y-projection of the 1st
- *   segment are kept in order to to avoid 64-bit divide operations
+ *   segment are kept in order to avoid 64-bit divide operations
  *   that are expensive on 32-bit architectures.
  */