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/kosagi/novena/video.c b/board/kosagi/novena/video.c
index 7083b6e..a97e97a 100644
--- a/board/kosagi/novena/video.c
+++ b/board/kosagi/novena/video.c
@@ -10,6 +10,7 @@
  */
 
 #include <common.h>
+#include <log.h>
 #include <linux/errno.h>
 #include <asm/gpio.h>
 #include <asm/io.h>