Cleanup loongson64 mach to use SPDX copyright format

To: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Subject: Cleanup loongson64 mach to use SPDX copyright format
From: Jiaxun Yang <jiaxun.yang@xxxxxxxxxxx>
Date: Tue, 26 Dec 2017 21:23:32 +0800
Cc: James Hogan <james.hogan@xxxxxxxx>, Huacai CHen <chenhc@xxxxxxxxxx>, linux-mips@xxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx
Original-recipient: rfc822;linux-mips@xxxxxxxxxxxxxx

This patchset should based on "Add YeeLoong support v6"

Follow-Ups:
- Cleanup loongson64 mach to use SPDX copyright format v2
  - From: Jiaxun Yang
- [PATCH 7/7] MIPS: Loongson64: cleanup all include files to use SPDX Identifier
  - From: Jiaxun Yang
- [PATCH 6/7] MIPS: Loongson64: cleanup all mach files to use SPDX Identifier
  - From: Jiaxun Yang
- [PATCH 5/7] MIPS: Loongson64: cleanup all loongson-3 files to use SPDX Identifier
  - From: Jiaxun Yang
- [PATCH 4/7] MIPS: Loongson64: cleanup all lemote-2f files to use SPDX Identifier
  - From: Jiaxun Yang
- [PATCH 3/7] MIPS: Loongson64: cleanup all fuloong-2e files to use SPDX Identifier
  - From: Jiaxun Yang
- [PATCH 2/7] MIPS: Loongson64: cleanup all loongson common files to use SPDX Identifier
  - From: Jiaxun Yang
- [PATCH 1/7] MIPS: Loongson64: cleanup all cs5536 files to use SPDX Identifier
  - From: Jiaxun Yang