usb: misc: remove unnecessary code

'val' is an unsigned variable, and less-than-zero comparison of an unsigned
variable is never true.

Addresses-Coverity-ID: 1230257
Signed-off-by: NGustavo A. R. Silva <garsilva@embeddedor.com>
Reviewed-by: NPeter Senna Tschudin <peter.senna@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/misc/lvstest.c

@@ -193,7 +193,7 @@ static ssize_t u2_timeout_store(struct device *dev,
 		return ret;
 	}
 
-	if (val < 0 || val > 127)
+	if (val > 127)
 		return -EINVAL;
 
 	ret = lvs_rh_set_port_feature(hdev, lvs->portnum | (val << 8),