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/board/synopsys/hsdk/env-lib.c b/board/synopsys/hsdk/env-lib.c
index f443c21..235f295 100644
--- a/board/synopsys/hsdk/env-lib.c
+++ b/board/synopsys/hsdk/env-lib.c
@@ -6,6 +6,7 @@
 
 #include "env-lib.h"
 #include <env.h>
+#include <log.h>
 
 #define MAX_CMD_LEN	25