Add YeeLoong support v5

To: James Hogan <jhogan@xxxxxxxxxx>
Subject: Add YeeLoong support v5
From: Jiaxun Yang <jiaxun.yang@xxxxxxxxxxx>
Date: Sat, 16 Dec 2017 22:57:46 +0800
Cc: Ralf Baechle <ralf@xxxxxxxxxxxxxx>, linux-mips@xxxxxxxxxxxxxx, Huacai Chan <chenhc@xxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx
Original-recipient: rfc822;linux-mips@xxxxxxxxxxxxxx

Change since v4:
Use SPDX ids copyright header

Follow-Ups:
- [PATCH v5 5/5] MAINTAINERS: Add entry for Lemote YeeLoong Extra Driver
  - From: Jiaxun Yang
- [PATCH v5 4/5] MIPS: Loongson64: Load platform device during boot
  - From: Jiaxun Yang
- [PATCH v5 3/5] MIPS: Loongson64: Yeeloong add platform driver
  - From: Jiaxun Yang
- [PATCH v5 2/5] MIPS: Loongson64: lemote-2f move ec_kb3310b.h to include dir and clean up
  - From: Jiaxun Yang
- [PATCH v5 1/5] MIPS: Lonngson64: Copy kernel command line from arcs_cmdline
  - From: Jiaxun Yang