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/spl/spl_onenand.c b/common/spl/spl_onenand.c
index 8ba3d40..93cbf47 100644
--- a/common/spl/spl_onenand.c
+++ b/common/spl/spl_onenand.c
@@ -10,6 +10,7 @@
 #include <common.h>
 #include <config.h>
 #include <image.h>
+#include <log.h>
 #include <spl.h>
 #include <asm/io.h>
 #include <onenand_uboot.h>