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/drivers/video/sandbox_sdl.c b/drivers/video/sandbox_sdl.c
index 1196e6c..20248e6 100644
--- a/drivers/video/sandbox_sdl.c
+++ b/drivers/video/sandbox_sdl.c
@@ -6,6 +6,7 @@
 #include <common.h>
 #include <dm.h>
 #include <fdtdec.h>
+#include <log.h>
 #include <video.h>
 #include <asm/sdl.h>
 #include <asm/state.h>