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/mediatek/mt8512/mt8512.c b/board/mediatek/mt8512/mt8512.c
index 726111d..4ad62b7 100644
--- a/board/mediatek/mt8512/mt8512.c
+++ b/board/mediatek/mt8512/mt8512.c
@@ -5,6 +5,7 @@
 
 #include <common.h>
 #include <dm.h>
+#include <log.h>
 #include <wdt.h>
 
 DECLARE_GLOBAL_DATA_PTR;