clk: Fix typo in header comment

Signed-off-by: Paul Barker <paul.barker.ct@bp.renesas.com>
Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
diff --git a/include/clk-uclass.h b/include/clk-uclass.h
index 65ebff9..a22f1a5 100644
--- a/include/clk-uclass.h
+++ b/include/clk-uclass.h
@@ -64,7 +64,7 @@
 
 /**
  * request() - Request a translated clock.
- * @clock:	The clock struct to request; this has been fille in by
+ * @clock:	The clock struct to request; this has been filled in by
  *		a previoux xxx_xlate() function call, or by the caller
  *		of clk_request().
  *