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/cmd/bootz.c b/cmd/bootz.c
index ac15856..bc15fd8e 100644
--- a/cmd/bootz.c
+++ b/cmd/bootz.c
@@ -10,6 +10,7 @@
 #include <image.h>
 #include <irq_func.h>
 #include <lmb.h>
+#include <log.h>
 #include <linux/compiler.h>
 
 int __weak bootz_setup(ulong image, ulong *start, ulong *end)