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/clk.c b/drivers/clk/clk.c
index 4c477a4..0f55ba7 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -6,6 +6,7 @@
 
 #include <common.h>
 #include <clk-uclass.h>
+#include <log.h>
 #include <dm/device.h>
 #include <dm/uclass.h>
 #include <dm/lists.h>