s390: cio: add SPDX identifiers to the remaining 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 drivers/s390/cio/ 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: Sebastian Ott <sebott@linux.vnet.ibm.com>
Cc: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Cornelia Huck <cohuck@redhat.com>
Cc: Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Kate Stewart <kstewart@linuxfoundation.org>
Cc: Philippe Ombredanne <pombredanne@nexb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

drivers/s390/cio/ccwgroup.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  *  bus driver for ccwgroup
  *

drivers/s390/cio/chp.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  *    Copyright IBM Corp. 1999, 2010
  *    Author(s): Cornelia Huck (cornelia.huck@de.ibm.com)

drivers/s390/cio/chsc.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  *   S/390 common I/O routines -- channel subsystem call
  *

drivers/s390/cio/chsc_sch.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * Driver for s390 chsc subchannels
  *

drivers/s390/cio/cio.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  *   S/390 common I/O routines -- low level i/o calls
  *

drivers/s390/cio/cmf.c

+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Linux on zSeries Channel Measurement Facility support
  *

drivers/s390/cio/css.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * driver for channel subsystem
  *

drivers/s390/cio/device.c

+// SPDX-License-Identifier: GPL-1.0+
 /*
  *  bus driver for ccw devices
  *

drivers/s390/cio/device_fsm.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * finite state machine for device handling
  *

drivers/s390/cio/device_ops.c

+// SPDX-License-Identifier: GPL-1.0+
 /*
  * Copyright IBM Corp. 2002, 2009
  *

drivers/s390/cio/eadm_sch.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * Driver for s390 eadm subchannels
  *

drivers/s390/cio/isc.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * Functions for registration of I/O interruption subclasses on s390.
  *

drivers/s390/cio/qdio_main.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * Linux for s390 qdio support, buffer handling, qdio API and module support.
  *

drivers/s390/cio/qdio_setup.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * qdio queue initialization
  *

drivers/s390/cio/scm.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * Recognize and maintain s390 storage class memory.
  *

drivers/s390/cio/vfio_ccw_drv.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * VFIO based Physical Subchannel device driver
  *