BugLink: http://bugs.launchpad.net/bugs/1685133

This patch adds the vendor release version on the Exar USB serial
device. Features include:
1. Fix for RX fail after wake-up from sleep (S3/S4)
2. Removes unnecessary debug messages

Changelog:

Version 1B, 11/6/2015
Fixed Bug: The conditional logic to support kernel 3.9 was
incorrect(line 396 in xr_usb_serial_common.c).

Version 1A, 1/9/2015
This driver will work with any USB UART function in these Exar devices:
	XR21V1410/1412/1414
	XR21B1411
	XR21B1420/1422/1424
	XR22801/802/804

Exar serial devices are typically enuremated as /dev/ttyXRUSB[0-3].
Signed-off-by: Shrirang Bagul <shrirang.bagul@canonical.com>
Acked-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>