USB: pl2303: increase bulk-in buffer size to 256 byte

The pl2303 requires a bulk-in buffer larger than endpoint size to keep
up at high baudrates without loosing data.
Signed-off-by: NJohan Hovold <jhovold@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/usb/serial/pl2303.c

@@ -1170,6 +1170,7 @@ static struct usb_serial_driver pl2303_device = {
 	.id_table =		id_table,
 	.usb_driver = 		&pl2303_driver,
 	.num_ports =		1,
+	.bulk_in_size =		256,
 	.bulk_out_size =	256,
 	.open =			pl2303_open,
 	.close =		pl2303_close,