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/fs/ubifs/ubifs.c b/fs/ubifs/ubifs.c
index bb35512..70beb84 100644
--- a/fs/ubifs/ubifs.c
+++ b/fs/ubifs/ubifs.c
@@ -14,6 +14,7 @@
 #include <common.h>
 #include <env.h>
 #include <gzip.h>
+#include <log.h>
 #include <malloc.h>
 #include <memalign.h>
 #include "ubifs.h"