common: Drop log.h from common header

Move this header out of the common header.

Signed-off-by: Simon Glass <sjg@chromium.org>

test/env/hashtable.c

@@ -6,6 +6,7 @@
 
 #include <common.h>
 #include <command.h>
+#include <log.h>
 #include <search.h>
 #include <stdio.h>
 #include <test/env.h>