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/board/freescale/mpc8572ds/mpc8572ds.c b/board/freescale/mpc8572ds/mpc8572ds.c
index 13cfe15..38c8bfd 100644
--- a/board/freescale/mpc8572ds/mpc8572ds.c
+++ b/board/freescale/mpc8572ds/mpc8572ds.c
@@ -8,6 +8,7 @@
 #include <env.h>
 #include <image.h>
 #include <init.h>
+#include <log.h>
 #include <net.h>
 #include <pci.h>
 #include <asm/processor.h>