BugLink: http://bugs.launchpad.net/bugs/1783241

The support for IXXAT USB SocketCAN devices was introduced in:
cddf5820 UBUNTU: SAUCE: (no-up) Support IXXAT USB SocketCAN device

This patch upgrades the driver with following changes:
- support adapters for CL1 (Communication Layer for legacy devices) and
  CL2 (current devices)
- removed CAN-IDM100 support (Microchip Rev A microcontroller)
- add CAN-IDM101 support (Microchip Rev B microcontroller)
- add Error-Passive recognition
- move CAN message handling to the core module
- use ktime API for timestamps
- fixes Linux kernel coding style issues

Changes from HMS/Dell's original driver dump "arev-2018-07-04":
- driver name retained from "beta-2018-05-07" for debain packaging
  compatibility
  IXXAT_USB_DRIVER_NAME "ixxat_usb2can" ->"ixx_usb"
- source files renamed to retain the old names SRU'ed for "beta-2018-05-07"
  renamed: ixxat_usb_cl1.c -> ixx_usb_cl1.c
  renamed: ixxat_usb_cl2.c -> ixx_usb_cl2.c
  renamed: ixxat_usb_core.c -> ixx_usb_core.c
  renamed: ixxat_usb_core.h -> ixx_usb_core.h
  deleted: ixx_usb_fd.c
  deleted: ixx_usb_v2.c
Signed-off-by: Shrirang Bagul <shrirang.bagul@canonical.com>
Acked-by: Anthony Wong <anthony.wong@canonical.com>
Acked-by: Wen-chien Jesse Sung <jesse.sung@canonical.com>
Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>