common: Drop log.h from common header

Move this header out of the common header.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/reset/reset-imx7.c b/drivers/reset/reset-imx7.c
index a61855e..bbbca139 100644
--- a/drivers/reset/reset-imx7.c
+++ b/drivers/reset/reset-imx7.c
@@ -3,6 +3,7 @@
  * Copyright (c) 2017, Impinj, Inc.
  */
 
+#include <log.h>
 #include <malloc.h>
 #include <asm/io.h>
 #include <common.h>