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/hisilicon/hikey/hikey.c b/board/hisilicon/hikey/hikey.c
index 2a50b84..df0f110 100644
--- a/board/hisilicon/hikey/hikey.c
+++ b/board/hisilicon/hikey/hikey.c
@@ -8,6 +8,7 @@
 #include <dm.h>
 #include <fdt_support.h>
 #include <init.h>
+#include <log.h>
 #include <dm/platform_data/serial_pl01x.h>
 #include <errno.h>
 #include <malloc.h>