Extend USB trace logic

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@2211 42af7a65-404d-4744-a932-0658087f49c3

drivers/usbdev/Make.defs

@@ -43,6 +43,6 @@ endif
 ifeq ($(CONFIG_USBSTRG),y)
 USBDEV_CSRCS  += usbdev_storage.c usbdev_scsi.c
 endif
-USBDEV_CSRCS  += usbdev_trace.c
+USBDEV_CSRCS  += usbdev_trace.c usbdev_trprint.c
 endif