There are a few remaining drivers/staging/*/Kconfig files that do not
have SPDX identifiers in them. Add the correct GPL-2.0 identifier to
them to make scanning tools happy.
# SPDX-License-Identifier: GPL-2.0
config PCI_MT7621
tristate "MediaTek MT7621 PCI Controller"
depends on RALINK
depends on PCI
select PCI_DRIVERS_GENERIC
help
This selects a driver for the MediaTek MT7621 PCI Controller.
