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/net/mdio-mux-uclass.c b/net/mdio-mux-uclass.c
index e425207..6674eb6 100644
--- a/net/mdio-mux-uclass.c
+++ b/net/mdio-mux-uclass.c
@@ -6,6 +6,7 @@
 
 #include <common.h>
 #include <dm.h>
+#include <log.h>
 #include <miiphy.h>
 #include <dm/device-internal.h>
 #include <dm/uclass-internal.h>