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/net/pfe_eth/pfe_hw.c b/drivers/net/pfe_eth/pfe_hw.c
index 7137ac1..caba871 100644
--- a/drivers/net/pfe_eth/pfe_hw.c
+++ b/drivers/net/pfe_eth/pfe_hw.c
@@ -3,6 +3,7 @@
  * Copyright 2015-2016 Freescale Semiconductor, Inc.
  * Copyright 2017 NXP
  */
+#include <log.h>
 #include <net/pfe_eth/pfe_eth.h>
 #include <net/pfe_eth/pfe/pfe_hw.h>