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/board/freescale/common/vsc3316_3308.c b/board/freescale/common/vsc3316_3308.c
index f0d273c..8aceb8e 100644
--- a/board/freescale/common/vsc3316_3308.c
+++ b/board/freescale/common/vsc3316_3308.c
@@ -5,6 +5,7 @@
  */
 
 #include "vsc3316_3308.h"
+#include <log.h>
 
 #define REVISION_ID_REG		0x7E
 #define INTERFACE_MODE_REG		0x79