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/gdsys/a38x/hre.c b/board/gdsys/a38x/hre.c
index 027ad1f..699241b 100644
--- a/board/gdsys/a38x/hre.c
+++ b/board/gdsys/a38x/hre.c
@@ -5,6 +5,7 @@
  */
 
 #include <common.h>
+#include <log.h>
 #include <malloc.h>
 #include <fs.h>
 #include <i2c.h>