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/lib/libavb/avb_slot_verify.c b/lib/libavb/avb_slot_verify.c
index 58baf52..ae8e1df 100644
--- a/lib/libavb/avb_slot_verify.c
+++ b/lib/libavb/avb_slot_verify.c
@@ -14,6 +14,7 @@
 #include "avb_util.h"
 #include "avb_vbmeta_image.h"
 #include "avb_version.h"
+#include <log.h>
 #include <malloc.h>
 
 /* Maximum number of partitions that can be loaded with avb_slot_verify(). */