reset: Rename free() to rfree()

This function name conflicts with our desire to #define free() to
something else on sandbox. Since it deals with resources, rename it to
rfree().

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/reset/reset-uclass.c b/drivers/reset/reset-uclass.c
index ee1a423..bf1cba4 100644
--- a/drivers/reset/reset-uclass.c
+++ b/drivers/reset/reset-uclass.c
@@ -164,7 +164,7 @@
 
 	debug("%s(reset_ctl=%p)\n", __func__, reset_ctl);
 
-	return ops->free(reset_ctl);
+	return ops->rfree(reset_ctl);
 }
 
 int reset_assert(struct reset_ctl *reset_ctl)