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/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index b2b2793..74b8e0c 100644
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -7,6 +7,7 @@
  */
 #undef DEBUG
 
+#include <log.h>
 #include <dm/devres.h>
 #include <linux/bitops.h>
 #include <linux/usb/composite.h>