USB: serial: cp210x: add ID for IMST iM871A-USB

BugLink: https://bugs.launchpad.net/bugs/2059991

commit 12b17b4 upstream.

The device IMST USB-Stick for Smart Meter is a rebranded IMST iM871A-USB
Wireless M-Bus USB-adapter. It is used to read wireless water, gas and
electricity meters.

Signed-off-by: Leonard Dallmayr <[email protected]>
Cc: [email protected]
Signed-off-by: Johan Hovold <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
Signed-off-by: Portia Stephens <[email protected]>
Signed-off-by: Roxana Nicolescu <[email protected]>

Author: ldallmayr

drivers/usb/serial/cp210x.c

@@ -146,6 +146,7 @@ static const struct usb_device_id id_table[] = {
 	{ USB_DEVICE(0x10C4, 0x85F8) }, /* Virtenio Preon32 */
 	{ USB_DEVICE(0x10C4, 0x8664) }, /* AC-Services CAN-IF */
 	{ USB_DEVICE(0x10C4, 0x8665) }, /* AC-Services OBD-IF */
+	{ USB_DEVICE(0x10C4, 0x87ED) }, /* IMST USB-Stick for Smart Meter */
 	{ USB_DEVICE(0x10C4, 0x8856) },	/* CEL EM357 ZigBee USB Stick - LR */
 	{ USB_DEVICE(0x10C4, 0x8857) },	/* CEL EM357 ZigBee USB Stick */
 	{ USB_DEVICE(0x10C4, 0x88A4) }, /* MMB Networks ZigBee USB Device */