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/common/fdt_support.c b/common/fdt_support.c
index fad551f..3778de5 100644
--- a/common/fdt_support.c
+++ b/common/fdt_support.c
@@ -8,6 +8,7 @@
 
 #include <common.h>
 #include <env.h>
+#include <log.h>
 #include <mapmem.h>
 #include <net.h>
 #include <stdio_dev.h>