s390: add a few more SPDX identifiers

Add the correct SPDX license to a few more files under arch/s390 and
drivers/s390 which have been missed to far.
The SPDX identifier is a legally binding shorthand, which can be used
instead of the full boiler plate text.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

arch/s390/Kbuild

+# SPDX-License-Identifier: GPL-2.0
 obj-y				+= kernel/
 obj-y				+= mm/
 obj-$(CONFIG_KVM)		+= kvm/

arch/s390/appldata/Makefile

+# SPDX-License-Identifier: GPL-2.0
 #
 # Makefile for the Linux - z/VM Monitor Stream.
 #

arch/s390/boot/compressed/vmlinux.scr

+/* SPDX-License-Identifier: GPL-2.0 */
 SECTIONS
 {
   .rodata.compressed : {

arch/s390/crypto/sha1_s390.c

+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Cryptographic API.
  *

arch/s390/hypfs/Makefile

+# SPDX-License-Identifier: GPL-2.0
 #
 # Makefile for the linux hypfs filesystem routines.
 #

arch/s390/include/asm/Kbuild

+# SPDX-License-Identifier: GPL-2.0
 generic-y += asm-offsets.h
 generic-y += cacheflush.h
 generic-y += clkdev.h

arch/s390/include/asm/alternative.h

+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _ASM_S390_ALTERNATIVE_H
 #define _ASM_S390_ALTERNATIVE_H
 

arch/s390/include/asm/ap.h

+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * Adjunct processor (AP) interfaces
  *

arch/s390/include/asm/bugs.h

+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  *  S390 version
  *    Copyright IBM Corp. 1999

arch/s390/include/asm/segment.h

+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _ASM_SEGMENT_H
 #define _ASM_SEGMENT_H
 

arch/s390/include/asm/vga.h

+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _ASM_S390_VGA_H
 #define _ASM_S390_VGA_H
 

arch/s390/include/uapi/asm/Kbuild

+# SPDX-License-Identifier: GPL-2.0
 # UAPI Header export list
 include include/uapi/asm-generic/Kbuild.asm
 

arch/s390/include/uapi/asm/perf_regs.h

+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
 #ifndef _ASM_S390_PERF_REGS_H
 #define _ASM_S390_PERF_REGS_H
 

arch/s390/include/uapi/asm/sthyi.h

+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
 #ifndef _UAPI_ASM_STHYI_H
 #define _UAPI_ASM_STHYI_H
 

arch/s390/include/uapi/asm/vmcp.h

+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
 /*
  * Copyright IBM Corp. 2004, 2005
  * Interface implementation for communication with the z/VM control program

arch/s390/kernel/alternative.c

+// SPDX-License-Identifier: GPL-2.0
 #include <linux/module.h>
 #include <asm/alternative.h>
 #include <asm/facility.h>

arch/s390/kernel/perf_regs.c

+// SPDX-License-Identifier: GPL-2.0
 #include <linux/perf_event.h>
 #include <linux/perf_regs.h>
 #include <linux/kernel.h>

arch/s390/kernel/vdso64/note.S

+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * This supplies .note.* sections to go into the PT_NOTE inside the vDSO text.
  * Here we can supply some information useful to userland.

arch/s390/net/Makefile

+# SPDX-License-Identifier: GPL-2.0
 #
 # Arch-specific network modules
 #

arch/s390/numa/Makefile

+# SPDX-License-Identifier: GPL-2.0
 obj-y			+= numa.o
 obj-y			+= toptree.o
 obj-$(CONFIG_NUMA_EMU)	+= mode_emu.o

arch/s390/pci/Makefile

+# SPDX-License-Identifier: GPL-2.0
 #
 # Makefile for the s390 PCI subsystem.
 #

arch/s390/tools/gen_opcode_table.c

+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * Generate opcode table initializers for the in-kernel disassembler.
  *

drivers/s390/Makefile

+# SPDX-License-Identifier: GPL-2.0
 #
 # Makefile for the S/390 specific device drivers
 #

drivers/s390/block/Kconfig

+# SPDX-License-Identifier: GPL-2.0
 comment "S/390 block device drivers"
 	depends on S390 && BLOCK
 

drivers/s390/char/Kconfig

+# SPDX-License-Identifier: GPL-2.0
 comment "S/390 character device drivers"
 	depends on S390
 

drivers/s390/char/defkeymap.map

+# SPDX-License-Identifier: GPL-2.0
 # Default keymap for 3270 (ebcdic codepage 037).
 keymaps 0-1,4-5
 

drivers/s390/cio/blacklist.h

+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef S390_BLACKLIST_H
 #define S390_BLACKLIST_H
 

drivers/s390/net/Kconfig

+# SPDX-License-Identifier: GPL-2.0
 menu "S/390 network device drivers"
 	depends on NETDEVICES && S390
 

drivers/s390/scsi/Makefile

+# SPDX-License-Identifier: GPL-2.0
 #
 # Makefile for the S/390 specific device drivers
 #