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/zfs/zfs.c b/fs/zfs/zfs.c
index 4331c16..1fec96c 100644
--- a/fs/zfs/zfs.c
+++ b/fs/zfs/zfs.c
@@ -11,6 +11,7 @@
  */
 
 #include <common.h>
+#include <log.h>
 #include <malloc.h>
 #include <linux/stat.h>
 #include <linux/time.h>