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/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index e445c70..8945abc 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -15,6 +15,7 @@
 
 #include <common.h>
 #include <cpu_func.h>
+#include <log.h>
 #include <malloc.h>
 #include <dm/device_compat.h>
 #include <dm/devres.h>