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/include/wdt.h b/include/wdt.h
index aea5abc..d2ccfbc 100644
--- a/include/wdt.h
+++ b/include/wdt.h
@@ -7,6 +7,7 @@
 #define _WDT_H_
 
 #include <dm.h>
+#include <log.h>
 #include <dm/read.h>
 
 /*