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/b4860qds/b4860qds.c b/board/freescale/b4860qds/b4860qds.c
index 037a8be..eed379a 100644
--- a/board/freescale/b4860qds/b4860qds.c
+++ b/board/freescale/b4860qds/b4860qds.c
@@ -11,6 +11,7 @@
 #include <image.h>
 #include <init.h>
 #include <irq_func.h>
+#include <log.h>
 #include <netdev.h>
 #include <linux/compiler.h>
 #include <asm/mmu.h>