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/cmd/mtdparts.c b/cmd/mtdparts.c
index 9fca085..5220142 100644
--- a/cmd/mtdparts.c
+++ b/cmd/mtdparts.c
@@ -73,6 +73,7 @@
 #include <common.h>
 #include <command.h>
 #include <env.h>
+#include <log.h>
 #include <malloc.h>
 #include <jffs2/load_kernel.h>
 #include <linux/list.h>