USB: ftdi_sio: fix 'product' parameter description

Signed-off-by: Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/serial/ftdi_sio.c

@@ -2459,5 +2459,5 @@ module_param(vendor, ushort, 0);
 MODULE_PARM_DESC(vendor, "User specified vendor ID (default="
 		__MODULE_STRING(FTDI_VID)")");
 module_param(product, ushort, 0);
-MODULE_PARM_DESC(vendor, "User specified product ID");
+MODULE_PARM_DESC(product, "User specified product ID");