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/host/xhci-dwc3.c b/drivers/usb/host/xhci-dwc3.c
index 563db1a..37b59c8 100644
--- a/drivers/usb/host/xhci-dwc3.c
+++ b/drivers/usb/host/xhci-dwc3.c
@@ -10,6 +10,7 @@
 #include <common.h>
 #include <dm.h>
 #include <generic-phy.h>
+#include <log.h>
 #include <usb.h>
 #include <dwc3-uboot.h>