USB: help text for mos 7720 driver

this driver's help text incorrectly claims to support only single port
devices.
Signed-off-by: NOliver Neukum <oneukum@suse.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/usb/serial/Kconfig

@@ -423,11 +423,11 @@ config USB_SERIAL_MCT_U232
 	  module will be called mct_u232.
 
 config USB_SERIAL_MOS7720
-	tristate "USB Moschip 7720 Single Port Serial Driver"
+	tristate "USB Moschip 7720 Serial Driver"
 	depends on USB_SERIAL
 	---help---
-	  Say Y here if you want to use a USB Serial single port adapter from
-	  Moschip Semiconductor Tech.
+	  Say Y here if you want to use USB Serial single and double
+	  port adapters from Moschip Semiconductor Tech.
 
 	  To compile this driver as a module, choose M here: the
 	  module will be called mos7720.