PCI: Add SPDX GPL-2.0 when no license was specified

b2441318 ("License cleanup: add SPDX GPL-2.0 license identifier to
files with no license") added SPDX GPL-2.0 to several PCI files that
previously contained no license information.

Add SPDX GPL-2.0 to all other PCI files that did not contain any license
information and hence were under the default GPL version 2 license of the
kernel.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/pci/Kconfig

+# SPDX-License-Identifier: GPL-2.0
 #
 # PCI configuration
 #

drivers/pci/access.c

+// SPDX-License-Identifier: GPL-2.0
 #include <linux/delay.h>
 #include <linux/pci.h>
 #include <linux/module.h>

drivers/pci/ats.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * drivers/pci/ats.c
  *

drivers/pci/bus.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  *	drivers/pci/bus.c
  *

drivers/pci/dwc/Kconfig

+# SPDX-License-Identifier: GPL-2.0
+
 menu "DesignWare PCI Core Support"
 
 config PCIE_DW

drivers/pci/endpoint/Kconfig

+# SPDX-License-Identifier: GPL-2.0
 #
 # PCI Endpoint Support
 #

drivers/pci/endpoint/Makefile

+# SPDX-License-Identifier: GPL-2.0
 #
 # Makefile for PCI Endpoint Support
 #

drivers/pci/endpoint/functions/Kconfig

+# SPDX-License-Identifier: GPL-2.0
 #
 # PCI Endpoint Functions
 #

drivers/pci/endpoint/functions/Makefile

+# SPDX-License-Identifier: GPL-2.0
 #
 # Makefile for PCI Endpoint Functions
 #

drivers/pci/host-bridge.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * host bridge related code
  */

drivers/pci/host/Kconfig

+# SPDX-License-Identifier: GPL-2.0
+
 menu "PCI host controller drivers"
 	depends on PCI
 

drivers/pci/host/pci-v3-semi.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * Support for V3 Semiconductor PCI Local Bus to PCI Bridge
  * Copyright (C) 2017 Linus Walleij <linus.walleij@linaro.org>

drivers/pci/hotplug/Kconfig

+# SPDX-License-Identifier: GPL-2.0
 #
 # PCI Hotplug support
 #

drivers/pci/iov.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * drivers/pci/iov.c
  *

drivers/pci/msi.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * File:	msi.c
  * Purpose:	PCI Message Signaled Interrupt (MSI)

drivers/pci/pci-acpi.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * File:	pci-acpi.c
  * Purpose:	Provide PCI support in ACPI

drivers/pci/pci.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  *	PCI Bus Services, see include/linux/pci.h for further explanation.
  *

drivers/pci/pcie/Kconfig

+# SPDX-License-Identifier: GPL-2.0
 #
 # PCI Express Port Bus Configuration
 #

drivers/pci/pcie/aer/Kconfig

+# SPDX-License-Identifier: GPL-2.0
 #
 # PCI Express Root Port Device AER Configuration
 #

drivers/pci/pcie/aer/Kconfig.debug

+# SPDX-License-Identifier: GPL-2.0
 #
 # PCI Express Root Port Device AER Debug Configuration
 #

drivers/pci/pcie/portdrv_bus.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * File:	portdrv_bus.c
  * Purpose:	PCI Express Port Bus Driver's Bus Overloading Functions

drivers/pci/probe.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * probe.c - PCI detection and setup code
  */

drivers/pci/remove.c

+// SPDX-License-Identifier: GPL-2.0
 #include <linux/pci.h>
 #include <linux/module.h>
 #include <linux/pci-aspm.h>

drivers/pci/rom.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * drivers/pci/rom.c
  *

drivers/pci/search.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  *	PCI searching functions.
  *

drivers/pci/setup-bus.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  *	drivers/pci/setup-bus.c
  *

drivers/pci/setup-irq.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  *	drivers/pci/setup-irq.c
  *

drivers/pci/slot.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * drivers/pci/slot.c
  * Copyright (C) 2006 Matthew Wilcox <matthew@wil.cx>

drivers/pci/switch/Kconfig

+# SPDX-License-Identifier: GPL-2.0
+
 menu "PCI switch controller drivers"
 	depends on PCI
 

drivers/pci/switch/Makefile

+# SPDX-License-Identifier: GPL-2.0
 obj-$(CONFIG_PCI_SW_SWITCHTEC) += switchtec.o

drivers/pci/vpd.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * File:	vpd.c
  * Purpose:	Provide PCI VPD support

drivers/pci/xen-pcifront.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * Xen PCI Frontend.
  *

lib/pci_iomap.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * Implement the default iomap interfaces
  *