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/test-main.c b/test/dm/test-main.c
index 62a0c69..53e5ca3 100644
--- a/test/dm/test-main.c
+++ b/test/dm/test-main.c
@@ -8,6 +8,7 @@
 #include <console.h>
 #include <dm.h>
 #include <errno.h>
+#include <log.h>
 #include <malloc.h>
 #include <asm/state.h>
 #include <dm/test.h>