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/test/dm/eth.c b/test/dm/eth.c
index ad5354b..99c1672 100644
--- a/test/dm/eth.c
+++ b/test/dm/eth.c
@@ -10,6 +10,7 @@
 #include <dm.h>
 #include <env.h>
 #include <fdtdec.h>
+#include <log.h>
 #include <malloc.h>
 #include <net.h>
 #include <dm/test.h>