correct debugging messages

Reference: /n/atom/patch/applied/usbdnit
Date: Tue Apr  1 04:24:44 CES 2014
Signed-off-by: quanstro@quanstro.net

--- /sys/src/cmd/usb/usbd/usbd.c	Tue Apr  1 04:24:35 2014
+++ /sys/src/cmd/usb/usbd/usbd.c	Tue Apr  1 04:24:37 2014
@@ -524,11 +524,11 @@
 	nd = pp->dev;
 	opendevdata(nd, ORDWR);
 	if(usbcmd(nd, Rh2d|Rstd|Rdev, Rsetaddress, nd->id, 0, nil, 0) < 0){
-		dprint(2, "%s: %s: rst port %d: setaddress: %r\n", argv0, d->dir, p);
+		dprint(2, "%s: %s: portreset %d: setaddress: %r\n", argv0, d->dir, p);
 		goto Fail;
 	}
 	if(devctl(nd, "address") < 0){
-		dprint(2, "%s: %s: rst port %d: set address: %r\n", argv0, d->dir, p);
+		dprint(2, "%s: %s: portreset %d: devctl setaddress: %r\n", argv0, d->dir, p);
 		goto Fail;
 	}
 	if(usbcmd(nd, Rh2d|Rstd|Rdev, Rsetconf, 1, 0, nil, 0) < 0){