USB: ehci-dbgp: drop dead code.

We can only reach this spot by breaking out of the scan loop,
so by construction ret > 0.

Found by Coverity, in a copy of this file in the Xen sources.
Signed-off-by: Tim Deegan <tim@xen.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/early/ehci-dbgp.c

@@ -568,10 +568,6 @@ static int _dbgp_external_startup(void)
 		dbgp_printk("Could not find attached debug device\n");
 		goto err;
 	}
-	if (ret < 0) {
-		dbgp_printk("Attached device is not a debug device\n");
-		goto err;
-	}
 	dbgp_endpoint_out = dbgp_desc.bDebugOutEndpoint;
 	dbgp_endpoint_in = dbgp_desc.bDebugInEndpoint;