driver core: add SPDX identifiers to all driver core files

It's good to have SPDX identifiers in all files to make it easier to
audit the kernel tree for correct licenses.

Update the driver core files files with the correct SPDX license
identifier based on the license text in the file itself.  The SPDX
identifier is a legally binding shorthand, which can be used instead of
the full boiler plate text.

This work is based on a script and data from Thomas Gleixner, Philippe
Ombredanne, and Kate Stewart.

Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: "Luis R. Rodriguez" <mcgrof@kernel.org>
Cc: William Breathitt Gray <vilhelm.gray@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Kate Stewart <kstewart@linuxfoundation.org>
Cc: Philippe Ombredanne <pombredanne@nexb.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/base/attribute_container.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * attribute_container.c - implementation of a simple container for classes
  *

drivers/base/bus.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * bus.c - bus driver management
  *

drivers/base/cacheinfo.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * cacheinfo support - processor cache information via sysfs
  *

drivers/base/class.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * class.c - basic device class management
  *

drivers/base/component.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * Componentized device handling.
  *

drivers/base/container.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * System bus type for containers.
  *

drivers/base/core.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * drivers/base/core.c - core driver model code (device registration, etc)
  *

drivers/base/cpu.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * CPU subsystem support
  */

drivers/base/dd.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * drivers/base/dd.c - The core device/driver interactions.
  *

drivers/base/devcoredump.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * This file is provided under the GPLv2 license.
  *

drivers/base/devres.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * drivers/base/devres.c - device resource management
  *

drivers/base/dma-contiguous.c

+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Contiguous Memory Allocator for DMA mapping framework
  * Copyright (c) 2010-2011 by Samsung Electronics.

drivers/base/dma-mapping.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * drivers/base/dma-mapping.c - arch-independent dma-mapping routines
  *

drivers/base/driver.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * driver.c - centralized device driver management
  *

drivers/base/firmware.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * firmware.c - firmware subsystem hoohaw.
  *

drivers/base/firmware_class.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * firmware_class.c - Multi purpose firmware loading support
  *

drivers/base/hypervisor.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * hypervisor.c - /sys/hypervisor subsystem.
  *

drivers/base/init.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (c) 2002-3 Patrick Mochel
  * Copyright (c) 2002-3 Open Source Development Labs

drivers/base/isa.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * ISA bus.
  */

drivers/base/map.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  *  linux/drivers/base/map.c
  *

drivers/base/module.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * module.c - module sysfs fun for drivers
  *

drivers/base/pinctrl.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * Driver core interface to the pinctrl subsystem.
  *

drivers/base/platform-msi.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * MSI framework for platform devices
  *

drivers/base/platform.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * platform.c - platform 'pseudo' bus for legacy devices
  *

drivers/base/property.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * property.c - Unified device property interface.
  *

drivers/base/soc.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) ST-Ericsson SA 2011
  *

drivers/base/syscore.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  *  syscore.c - Execution of system core operations.
  *

drivers/base/test/test_async_driver_probe.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2014 Google, Inc.
  *

drivers/base/topology.c

+// SPDX-License-Identifier: GPL-2.0+
 /*
  * driver/base/topology.c - Populate sysfs with cpu topology information
  *

drivers/base/transport_class.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * transport_class.c - implementation of generic transport classes
  *                     using attribute_containers

include/linux/device.h

+// SPDX-License-Identifier: GPL-2.0
 /*
  * device.h - generic, centralized driver model
  *