tools: usb: testusb: change the default value for length from 512 to 1024

For ctrl out test, it needs length > vary, so in order to run it with
default parameters, we do this change.
Acked-by: Michal Nazarewicz <mina86@mina86.com>
Cc: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

tools/usb/testusb.c

@@ -394,7 +394,7 @@ int main (int argc, char **argv)
 	 *      low speed, interrupt    8 *  1     =     8
 	 */
 	param.iterations = 1000;
-	param.length = 512;
+	param.length = 1024;
 	param.vary = 512;
 	param.sglen = 32;
 
@@ -455,7 +455,7 @@ int main (int argc, char **argv)
 			"\t-n		no test running, show devices to be tested\n"
 			"Case arguments:\n"
 			"\t-c iterations		default 1000\n"
-			"\t-s transfer length	default 512\n"
+			"\t-s transfer length	default 1024\n"
 			"\t-g sglen		default 32\n"
 			"\t-v vary			default 512\n",
 			argv[0]);