USB: pl2303: make type data const

Declare constant device-type data as const.
Signed-off-by: NJohan Hovold <jhovold@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/serial/pl2303.c

@@ -141,7 +141,7 @@ struct pl2303_type_data {
 };
 
 struct pl2303_serial_private {
-	struct pl2303_type_data *type;
+	const struct pl2303_type_data *type;
 	unsigned long quirks;
 };
 
@@ -153,7 +153,7 @@ struct pl2303_private {
 	u8 line_settings[7];
 };
 
-static struct pl2303_type_data pl2303_type_data[TYPE_COUNT] = {
+static const struct pl2303_type_data pl2303_type_data[TYPE_COUNT] = {
 	[TYPE_01] = {
 		.max_baud_rate =	1228800,
 		.quirks =		PL2303_QUIRK_LEGACY,