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/broadcom/bcm28155_ap/bcm28155_ap.c b/board/broadcom/bcm28155_ap/bcm28155_ap.c
index 40ced1a..e3bf808 100644
--- a/board/broadcom/bcm28155_ap/bcm28155_ap.c
+++ b/board/broadcom/bcm28155_ap/bcm28155_ap.c
@@ -5,6 +5,7 @@
 
 #include <common.h>
 #include <init.h>
+#include <log.h>
 #include <asm/io.h>
 #include <asm/mach-types.h>
 #include <env.h>