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/fs/fat/fat.c b/fs/fat/fat.c
index 425d877..7fd2947 100644
--- a/fs/fat/fat.c
+++ b/fs/fat/fat.c
@@ -14,6 +14,7 @@
 #include <exports.h>
 #include <fat.h>
 #include <fs.h>
+#include <log.h>
 #include <asm/byteorder.h>
 #include <part.h>
 #include <malloc.h>