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/drivers/clk/aspeed/clk_ast2500.c b/drivers/clk/aspeed/clk_ast2500.c
index f4a441a..e5b07c7 100644
--- a/drivers/clk/aspeed/clk_ast2500.c
+++ b/drivers/clk/aspeed/clk_ast2500.c
@@ -6,6 +6,7 @@
 #include <common.h>
 #include <clk-uclass.h>
 #include <dm.h>
+#include <log.h>
 #include <asm/io.h>
 #include <asm/arch/scu_ast2500.h>
 #include <dm/lists.h>