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/drivers/dfu/dfu_virt.c b/drivers/dfu/dfu_virt.c
index ea8c71f..62605bc 100644
--- a/drivers/dfu/dfu_virt.c
+++ b/drivers/dfu/dfu_virt.c
@@ -5,6 +5,7 @@
 #include <common.h>
 #include <dfu.h>
 #include <errno.h>
+#include <log.h>
 #include <malloc.h>
 
 int __weak dfu_write_medium_virt(struct dfu_entity *dfu, u64 offset,